Implement localization in DiscordChatExporter following YoutubeDownloader pattern

Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>
2026-06-14 11:26:33 +00:00 · 2026-02-24 07:40:35 +00:00
parent 10a5d1b2bf
commit b1b0dc1625
16 changed files with 794 additions and 77 deletions
--- a/DiscordChatExporter.Gui/App.axaml.cs
+++ b/DiscordChatExporter.Gui/App.axaml.cs
@@ -5,6 +5,7 @@ using Avalonia.Markup.Xaml;
 using Avalonia.Media;
 using Avalonia.Platform;
 using DiscordChatExporter.Gui.Framework;
+using DiscordChatExporter.Gui.Localization;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.Utils;
 using DiscordChatExporter.Gui.Utils.Extensions;
@@ -39,6 +40,9 @@ public class App : Application, IDisposable
        services.AddSingleton<SettingsService>();
        services.AddSingleton<UpdateService>();

+        // Localization
+        services.AddSingleton<LocalizationManager>();
+
        // View models
        services.AddTransient<MainViewModel>();
        services.AddTransient<DashboardViewModel>();
--- a/DiscordChatExporter.Gui/Localization/Language.cs
+++ b/DiscordChatExporter.Gui/Localization/Language.cs
@@ -0,0 +1,11 @@
+namespace DiscordChatExporter.Gui.Localization;
+
+public enum Language
+{
+    System,
+    English,
+    Ukrainian,
+    German,
+    French,
+    Spanish,
+}
--- a/DiscordChatExporter.Gui/Localization/LocalizationManager.English.cs
+++ b/DiscordChatExporter.Gui/Localization/LocalizationManager.English.cs
@@ -0,0 +1,99 @@
+using System.Collections.Generic;
+
+namespace DiscordChatExporter.Gui.Localization;
+
+public partial class LocalizationManager
+{
+    private static readonly IReadOnlyDictionary<string, string> EnglishLocalization =
+        new Dictionary<string, string>
+        {
+            // Dashboard
+            [nameof(PullGuildsTooltip)] = "Pull available servers and channels (Enter)",
+            [nameof(SettingsTooltip)] = "Settings",
+            [nameof(LastMessageSentTooltip)] = "Last message sent:",
+            // Settings
+            [nameof(SettingsTitle)] = "Settings",
+            [nameof(ThemeLabel)] = "Theme",
+            [nameof(ThemeTooltip)] = "Preferred user interface theme",
+            [nameof(LanguageLabel)] = "Language",
+            [nameof(LanguageTooltip)] = "Preferred user interface language",
+            [nameof(AutoUpdateLabel)] = "Auto-update",
+            [nameof(AutoUpdateTooltip)] = "Perform automatic updates on every launch",
+            [nameof(PersistTokenLabel)] = "Persist token",
+            [nameof(PersistTokenTooltip)] =
+                "Save the last used token to a file so that it can be persisted between sessions",
+            [nameof(RateLimitPreferenceLabel)] = "Rate limit preference",
+            [nameof(RateLimitPreferenceTooltip)] =
+                "Whether to respect advisory rate limits. If disabled, only hard rate limits (i.e. 429 responses) will be respected.",
+            [nameof(ShowThreadsLabel)] = "Show threads",
+            [nameof(ShowThreadsTooltip)] = "Which types of threads to show in the channel list",
+            [nameof(LocaleLabel)] = "Locale",
+            [nameof(LocaleTooltip)] = "Locale to use when formatting dates and numbers",
+            [nameof(NormalizeToUtcLabel)] = "Normalize to UTC",
+            [nameof(NormalizeToUtcTooltip)] = "Normalize all timestamps to UTC+0",
+            [nameof(ParallelLimitLabel)] = "Parallel limit",
+            [nameof(ParallelLimitTooltip)] = "How many channels can be exported at the same time",
+            // Export Setup
+            [nameof(ChannelsSelectedText)] = "channels selected",
+            [nameof(OutputPathLabel)] = "Output path",
+            [nameof(FormatLabel)] = "Format",
+            [nameof(FormatTooltip)] = "Export format",
+            [nameof(AfterDateLabel)] = "After (date)",
+            [nameof(AfterDateTooltip)] = "Only include messages sent after this date",
+            [nameof(BeforeDateLabel)] = "Before (date)",
+            [nameof(BeforeDateTooltip)] = "Only include messages sent before this date",
+            [nameof(AfterTimeLabel)] = "After (time)",
+            [nameof(AfterTimeTooltip)] = "Only include messages sent after this time",
+            [nameof(BeforeTimeLabel)] = "Before (time)",
+            [nameof(BeforeTimeTooltip)] = "Only include messages sent before this time",
+            [nameof(PartitionLimitLabel)] = "Partition limit",
+            [nameof(PartitionLimitTooltip)] =
+                "Split the output into partitions, each limited to the specified number of messages (e.g. '100') or file size (e.g. '10mb')",
+            [nameof(MessageFilterLabel)] = "Message filter",
+            [nameof(MessageFilterTooltip)] =
+                "Only include messages that satisfy this filter (e.g. 'from:foo#1234' or 'has:image'). See the documentation for more info.",
+            [nameof(FormatMarkdownLabel)] = "Format markdown",
+            [nameof(FormatMarkdownTooltip)] =
+                "Process markdown, mentions, and other special tokens",
+            [nameof(DownloadAssetsLabel)] = "Download assets",
+            [nameof(DownloadAssetsTooltip)] =
+                "Download assets referenced by the export (user avatars, attached files, embedded images, etc.)",
+            [nameof(ReuseAssetsLabel)] = "Reuse assets",
+            [nameof(ReuseAssetsTooltip)] =
+                "Reuse previously downloaded assets to avoid redundant requests",
+            [nameof(AssetsDirPathLabel)] = "Assets directory path",
+            [nameof(AssetsDirPathTooltip)] =
+                "Download assets to this directory. If not specified, the asset directory path will be derived from the output path.",
+            [nameof(AdvancedOptionsTooltip)] = "Toggle advanced options",
+            [nameof(ExportButton)] = "EXPORT",
+            // Common buttons
+            [nameof(CloseButton)] = "CLOSE",
+            [nameof(CancelButton)] = "CANCEL",
+            // Dialog messages
+            [nameof(UkraineSupportTitle)] = "Thank you for supporting Ukraine!",
+            [nameof(UkraineSupportMessage)] = """
+                As Russia wages a genocidal war against my country, I'm grateful to everyone who continues to stand with Ukraine in our fight for freedom.
+
+                Click LEARN MORE to find ways that you can help.
+                """,
+            [nameof(LearnMoreButton)] = "LEARN MORE",
+            [nameof(UnstableBuildTitle)] = "Unstable build warning",
+            [nameof(UnstableBuildMessage)] = """
+                You're using a development build of {0}. These builds are not thoroughly tested and may contain bugs.
+
+                Auto-updates are disabled for development builds.
+
+                Click SEE RELEASES if you want to download a stable release instead.
+                """,
+            [nameof(SeeReleasesButton)] = "SEE RELEASES",
+            [nameof(UpdateDownloadingMessage)] = "Downloading update to {0} v{1}...",
+            [nameof(UpdateReadyMessage)] =
+                "Update has been downloaded and will be installed when you exit",
+            [nameof(UpdateInstallNowButton)] = "INSTALL NOW",
+            [nameof(UpdateFailedMessage)] = "Failed to perform application update",
+            [nameof(ErrorPullingServersTitle)] = "Error pulling servers",
+            [nameof(ErrorPullingChannelsTitle)] = "Error pulling channels",
+            [nameof(ErrorExportingTitle)] = "Error exporting channel(s)",
+            [nameof(SuccessfulExportMessage)] = "Successfully exported {0} channel(s)",
+        };
+}
--- a/DiscordChatExporter.Gui/Localization/LocalizationManager.French.cs
+++ b/DiscordChatExporter.Gui/Localization/LocalizationManager.French.cs
@@ -0,0 +1,101 @@
+using System.Collections.Generic;
+
+namespace DiscordChatExporter.Gui.Localization;
+
+public partial class LocalizationManager
+{
+    private static readonly IReadOnlyDictionary<string, string> FrenchLocalization = new Dictionary<
+        string,
+        string
+    >
+    {
+        // Dashboard
+        [nameof(PullGuildsTooltip)] = "Charger les serveurs et canaux disponibles (Entrée)",
+        [nameof(SettingsTooltip)] = "Paramètres",
+        [nameof(LastMessageSentTooltip)] = "Dernier message envoyé :",
+        // Settings
+        [nameof(SettingsTitle)] = "Paramètres",
+        [nameof(ThemeLabel)] = "Thème",
+        [nameof(ThemeTooltip)] = "Thème d'interface préféré",
+        [nameof(LanguageLabel)] = "Langue",
+        [nameof(LanguageTooltip)] = "Langue d'interface préférée",
+        [nameof(AutoUpdateLabel)] = "Mise à jour automatique",
+        [nameof(AutoUpdateTooltip)] = "Effectuer des mises à jour automatiques à chaque lancement",
+        [nameof(PersistTokenLabel)] = "Conserver le token",
+        [nameof(PersistTokenTooltip)] =
+            "Enregistrer le dernier token utilisé dans un fichier pour le conserver entre les sessions",
+        [nameof(RateLimitPreferenceLabel)] = "Préférence de limite de débit",
+        [nameof(RateLimitPreferenceTooltip)] =
+            "Indique s'il faut respecter les limites de débit recommandées. Si désactivé, seules les limites strictes (réponses 429) seront respectées.",
+        [nameof(ShowThreadsLabel)] = "Afficher les fils",
+        [nameof(ShowThreadsTooltip)] = "Quels types de fils afficher dans la liste des canaux",
+        [nameof(LocaleLabel)] = "Locale",
+        [nameof(LocaleTooltip)] = "Locale à utiliser pour le formatage des dates et des nombres",
+        [nameof(NormalizeToUtcLabel)] = "Normaliser en UTC",
+        [nameof(NormalizeToUtcTooltip)] = "Normaliser tous les horodatages en UTC+0",
+        [nameof(ParallelLimitLabel)] = "Limite parallèle",
+        [nameof(ParallelLimitTooltip)] = "Combien de canaux peuvent être exportés simultanément",
+        // Export Setup
+        [nameof(ChannelsSelectedText)] = "canaux sélectionnés",
+        [nameof(OutputPathLabel)] = "Chemin de sortie",
+        [nameof(FormatLabel)] = "Format",
+        [nameof(FormatTooltip)] = "Format d'exportation",
+        [nameof(AfterDateLabel)] = "Après (date)",
+        [nameof(AfterDateTooltip)] = "Inclure uniquement les messages envoyés après cette date",
+        [nameof(BeforeDateLabel)] = "Avant (date)",
+        [nameof(BeforeDateTooltip)] = "Inclure uniquement les messages envoyés avant cette date",
+        [nameof(AfterTimeLabel)] = "Après (heure)",
+        [nameof(AfterTimeTooltip)] = "Inclure uniquement les messages envoyés après cette heure",
+        [nameof(BeforeTimeLabel)] = "Avant (heure)",
+        [nameof(BeforeTimeTooltip)] = "Inclure uniquement les messages envoyés avant cette heure",
+        [nameof(PartitionLimitLabel)] = "Limite de partition",
+        [nameof(PartitionLimitTooltip)] =
+            "Diviser la sortie en partitions, chacune limitée au nombre de messages spécifié (ex. '100') ou à la taille de fichier (ex. '10mb')",
+        [nameof(MessageFilterLabel)] = "Filtre de messages",
+        [nameof(MessageFilterTooltip)] =
+            "Inclure uniquement les messages satisfaisant ce filtre (ex. 'from:foo#1234' ou 'has:image'). Voir la documentation pour plus d'informations.",
+        [nameof(FormatMarkdownLabel)] = "Formater le markdown",
+        [nameof(FormatMarkdownTooltip)] =
+            "Traiter le markdown, les mentions et autres tokens spéciaux",
+        [nameof(DownloadAssetsLabel)] = "Télécharger les ressources",
+        [nameof(DownloadAssetsTooltip)] =
+            "Télécharger les ressources référencées par l'export (avatars, fichiers joints, images intégrées, etc.)",
+        [nameof(ReuseAssetsLabel)] = "Réutiliser les ressources",
+        [nameof(ReuseAssetsTooltip)] =
+            "Réutiliser les ressources précédemment téléchargées pour éviter les requêtes redondantes",
+        [nameof(AssetsDirPathLabel)] = "Chemin du dossier des ressources",
+        [nameof(AssetsDirPathTooltip)] =
+            "Télécharger les ressources dans ce dossier. Si non spécifié, le chemin sera dérivé du chemin de sortie.",
+        [nameof(AdvancedOptionsTooltip)] = "Basculer les options avancées",
+        [nameof(ExportButton)] = "EXPORTER",
+        // Common buttons
+        [nameof(CloseButton)] = "FERMER",
+        [nameof(CancelButton)] = "ANNULER",
+        // Dialog messages
+        [nameof(UkraineSupportTitle)] = "Merci de soutenir l'Ukraine !",
+        [nameof(UkraineSupportMessage)] = """
+            Alors que la Russie mène une guerre génocidaire contre mon pays, je suis reconnaissant envers tous ceux qui continuent à soutenir l'Ukraine dans notre lutte pour la liberté.
+
+            Cliquez sur EN SAVOIR PLUS pour trouver des moyens d'aider.
+            """,
+        [nameof(LearnMoreButton)] = "EN SAVOIR PLUS",
+        [nameof(UnstableBuildTitle)] = "Avertissement : version instable",
+        [nameof(UnstableBuildMessage)] = """
+            Vous utilisez une version de développement de {0}. Ces versions ne sont pas rigoureusement testées et peuvent contenir des bugs.
+
+            Les mises à jour automatiques sont désactivées pour les versions de développement.
+
+            Cliquez sur VOIR LES VERSIONS pour télécharger une version stable.
+            """,
+        [nameof(SeeReleasesButton)] = "VOIR LES VERSIONS",
+        [nameof(UpdateDownloadingMessage)] = "Téléchargement de la mise à jour vers {0} v{1}...",
+        [nameof(UpdateReadyMessage)] =
+            "La mise à jour a été téléchargée et sera installée à la fermeture",
+        [nameof(UpdateInstallNowButton)] = "INSTALLER MAINTENANT",
+        [nameof(UpdateFailedMessage)] = "Échec de la mise à jour de l'application",
+        [nameof(ErrorPullingServersTitle)] = "Erreur lors du chargement des serveurs",
+        [nameof(ErrorPullingChannelsTitle)] = "Erreur lors du chargement des canaux",
+        [nameof(ErrorExportingTitle)] = "Erreur lors de l'exportation des canaux",
+        [nameof(SuccessfulExportMessage)] = "{0} canal(-aux) exporté(s) avec succès",
+    };
+}
--- a/DiscordChatExporter.Gui/Localization/LocalizationManager.German.cs
+++ b/DiscordChatExporter.Gui/Localization/LocalizationManager.German.cs
@@ -0,0 +1,105 @@
+using System.Collections.Generic;
+
+namespace DiscordChatExporter.Gui.Localization;
+
+public partial class LocalizationManager
+{
+    private static readonly IReadOnlyDictionary<string, string> GermanLocalization = new Dictionary<
+        string,
+        string
+    >
+    {
+        // Dashboard
+        [nameof(PullGuildsTooltip)] = "Verfügbare Server und Kanäle laden (Enter)",
+        [nameof(SettingsTooltip)] = "Einstellungen",
+        [nameof(LastMessageSentTooltip)] = "Letzte Nachricht gesendet:",
+        // Settings
+        [nameof(SettingsTitle)] = "Einstellungen",
+        [nameof(ThemeLabel)] = "Design",
+        [nameof(ThemeTooltip)] = "Bevorzugtes Oberflächendesign",
+        [nameof(LanguageLabel)] = "Sprache",
+        [nameof(LanguageTooltip)] = "Bevorzugte Sprache der Benutzeroberfläche",
+        [nameof(AutoUpdateLabel)] = "Automatische Updates",
+        [nameof(AutoUpdateTooltip)] = "Automatische Updates bei jedem Start durchführen",
+        [nameof(PersistTokenLabel)] = "Token speichern",
+        [nameof(PersistTokenTooltip)] =
+            "Den zuletzt verwendeten Token in einer Datei speichern, damit er zwischen Sitzungen erhalten bleibt",
+        [nameof(RateLimitPreferenceLabel)] = "Ratenlimit-Einstellung",
+        [nameof(RateLimitPreferenceTooltip)] =
+            "Ob empfohlene Ratenlimits eingehalten werden sollen. Wenn deaktiviert, werden nur harte Ratenlimits (d. h. 429-Antworten) eingehalten.",
+        [nameof(ShowThreadsLabel)] = "Threads anzeigen",
+        [nameof(ShowThreadsTooltip)] = "Welche Thread-Typen in der Kanalliste angezeigt werden",
+        [nameof(LocaleLabel)] = "Gebietsschema",
+        [nameof(LocaleTooltip)] = "Gebietsschema für die Formatierung von Daten und Zahlen",
+        [nameof(NormalizeToUtcLabel)] = "Auf UTC normalisieren",
+        [nameof(NormalizeToUtcTooltip)] = "Alle Zeitstempel auf UTC+0 normalisieren",
+        [nameof(ParallelLimitLabel)] = "Paralleles Limit",
+        [nameof(ParallelLimitTooltip)] = "Wie viele Kanäle gleichzeitig exportiert werden können",
+        // Export Setup
+        [nameof(ChannelsSelectedText)] = "Kanäle ausgewählt",
+        [nameof(OutputPathLabel)] = "Ausgabepfad",
+        [nameof(FormatLabel)] = "Format",
+        [nameof(FormatTooltip)] = "Exportformat",
+        [nameof(AfterDateLabel)] = "Nach (Datum)",
+        [nameof(AfterDateTooltip)] =
+            "Nur Nachrichten einschließen, die nach diesem Datum gesendet wurden",
+        [nameof(BeforeDateLabel)] = "Vor (Datum)",
+        [nameof(BeforeDateTooltip)] =
+            "Nur Nachrichten einschließen, die vor diesem Datum gesendet wurden",
+        [nameof(AfterTimeLabel)] = "Nach (Uhrzeit)",
+        [nameof(AfterTimeTooltip)] =
+            "Nur Nachrichten einschließen, die nach dieser Uhrzeit gesendet wurden",
+        [nameof(BeforeTimeLabel)] = "Vor (Uhrzeit)",
+        [nameof(BeforeTimeTooltip)] =
+            "Nur Nachrichten einschließen, die vor dieser Uhrzeit gesendet wurden",
+        [nameof(PartitionLimitLabel)] = "Partitionslimit",
+        [nameof(PartitionLimitTooltip)] =
+            "Die Ausgabe in Partitionen aufteilen, jede begrenzt auf die angegebene Anzahl von Nachrichten (z. B. '100') oder Dateigröße (z. B. '10mb')",
+        [nameof(MessageFilterLabel)] = "Nachrichtenfilter",
+        [nameof(MessageFilterTooltip)] =
+            "Nur Nachrichten einschließen, die diesem Filter entsprechen (z. B. 'from:foo#1234' oder 'has:image'). Weitere Informationen finden Sie in der Dokumentation.",
+        [nameof(FormatMarkdownLabel)] = "Markdown formatieren",
+        [nameof(FormatMarkdownTooltip)] =
+            "Markdown, Erwähnungen und andere spezielle Token verarbeiten",
+        [nameof(DownloadAssetsLabel)] = "Assets herunterladen",
+        [nameof(DownloadAssetsTooltip)] =
+            "Vom Export referenzierte Assets herunterladen (Benutzeravatare, angehängte Dateien, eingebettete Bilder usw.)",
+        [nameof(ReuseAssetsLabel)] = "Assets wiederverwenden",
+        [nameof(ReuseAssetsTooltip)] =
+            "Zuvor heruntergeladene Assets wiederverwenden, um redundante Anfragen zu vermeiden",
+        [nameof(AssetsDirPathLabel)] = "Asset-Verzeichnispfad",
+        [nameof(AssetsDirPathTooltip)] =
+            "Assets in dieses Verzeichnis herunterladen. Wenn nicht angegeben, wird der Asset-Verzeichnispfad vom Ausgabepfad abgeleitet.",
+        [nameof(AdvancedOptionsTooltip)] = "Erweiterte Optionen umschalten",
+        [nameof(ExportButton)] = "EXPORTIEREN",
+        // Common buttons
+        [nameof(CloseButton)] = "SCHLIESSEN",
+        [nameof(CancelButton)] = "ABBRECHEN",
+        // Dialog messages
+        [nameof(UkraineSupportTitle)] = "Danke für Ihre Unterstützung der Ukraine!",
+        [nameof(UkraineSupportMessage)] = """
+            Während Russland einen Vernichtungskrieg gegen mein Land führt, bin ich jedem dankbar, der weiterhin an der Seite der Ukraine in unserem Kampf für die Freiheit steht.
+
+            Klicken Sie auf MEHR ERFAHREN, um Möglichkeiten der Unterstützung zu finden.
+            """,
+        [nameof(LearnMoreButton)] = "MEHR ERFAHREN",
+        [nameof(UnstableBuildTitle)] = "Warnung: Instabile Version",
+        [nameof(UnstableBuildMessage)] = """
+            Sie verwenden eine Entwicklungsversion von {0}. Diese Versionen wurden nicht gründlich getestet und können Fehler enthalten.
+
+            Automatische Updates sind für Entwicklungsversionen deaktiviert.
+
+            Klicken Sie auf RELEASES ANZEIGEN, wenn Sie stattdessen eine stabile Version herunterladen möchten.
+            """,
+        [nameof(SeeReleasesButton)] = "RELEASES ANZEIGEN",
+        [nameof(UpdateDownloadingMessage)] = "Update auf {0} v{1} wird heruntergeladen...",
+        [nameof(UpdateReadyMessage)] =
+            "Update wurde heruntergeladen und wird beim Beenden installiert",
+        [nameof(UpdateInstallNowButton)] = "JETZT INSTALLIEREN",
+        [nameof(UpdateFailedMessage)] = "Anwendungsupdate konnte nicht durchgeführt werden",
+        [nameof(ErrorPullingServersTitle)] = "Fehler beim Laden der Server",
+        [nameof(ErrorPullingChannelsTitle)] = "Fehler beim Laden der Kanäle",
+        [nameof(ErrorExportingTitle)] = "Fehler beim Exportieren der Kanäle",
+        [nameof(SuccessfulExportMessage)] = "{0} Kanal/-äle erfolgreich exportiert",
+    };
+}
--- a/DiscordChatExporter.Gui/Localization/LocalizationManager.Spanish.cs
+++ b/DiscordChatExporter.Gui/Localization/LocalizationManager.Spanish.cs
@@ -0,0 +1,99 @@
+using System.Collections.Generic;
+
+namespace DiscordChatExporter.Gui.Localization;
+
+public partial class LocalizationManager
+{
+    private static readonly IReadOnlyDictionary<string, string> SpanishLocalization =
+        new Dictionary<string, string>
+        {
+            // Dashboard
+            [nameof(PullGuildsTooltip)] = "Cargar servidores y canales disponibles (Enter)",
+            [nameof(SettingsTooltip)] = "Ajustes",
+            [nameof(LastMessageSentTooltip)] = "Último mensaje enviado:",
+            // Settings
+            [nameof(SettingsTitle)] = "Ajustes",
+            [nameof(ThemeLabel)] = "Tema",
+            [nameof(ThemeTooltip)] = "Tema de interfaz preferido",
+            [nameof(LanguageLabel)] = "Idioma",
+            [nameof(LanguageTooltip)] = "Idioma de interfaz preferido",
+            [nameof(AutoUpdateLabel)] = "Actualización automática",
+            [nameof(AutoUpdateTooltip)] = "Realizar actualizaciones automáticas en cada inicio",
+            [nameof(PersistTokenLabel)] = "Guardar token",
+            [nameof(PersistTokenTooltip)] =
+                "Guardar el último token utilizado en un archivo para conservarlo entre sesiones",
+            [nameof(RateLimitPreferenceLabel)] = "Preferencia de límite de velocidad",
+            [nameof(RateLimitPreferenceTooltip)] =
+                "Si se deben respetar los límites de velocidad recomendados. Si está desactivado, solo se respetarán los límites estrictos (respuestas 429).",
+            [nameof(ShowThreadsLabel)] = "Mostrar hilos",
+            [nameof(ShowThreadsTooltip)] = "Qué tipos de hilos mostrar en la lista de canales",
+            [nameof(LocaleLabel)] = "Configuración regional",
+            [nameof(LocaleTooltip)] = "Configuración regional para el formato de fechas y números",
+            [nameof(NormalizeToUtcLabel)] = "Normalizar a UTC",
+            [nameof(NormalizeToUtcTooltip)] = "Normalizar todas las marcas de tiempo a UTC+0",
+            [nameof(ParallelLimitLabel)] = "Límite paralelo",
+            [nameof(ParallelLimitTooltip)] = "Cuántos canales pueden exportarse al mismo tiempo",
+            // Export Setup
+            [nameof(ChannelsSelectedText)] = "canales seleccionados",
+            [nameof(OutputPathLabel)] = "Ruta de salida",
+            [nameof(FormatLabel)] = "Formato",
+            [nameof(FormatTooltip)] = "Formato de exportación",
+            [nameof(AfterDateLabel)] = "Después (fecha)",
+            [nameof(AfterDateTooltip)] = "Solo incluir mensajes enviados después de esta fecha",
+            [nameof(BeforeDateLabel)] = "Antes (fecha)",
+            [nameof(BeforeDateTooltip)] = "Solo incluir mensajes enviados antes de esta fecha",
+            [nameof(AfterTimeLabel)] = "Después (hora)",
+            [nameof(AfterTimeTooltip)] = "Solo incluir mensajes enviados después de esta hora",
+            [nameof(BeforeTimeLabel)] = "Antes (hora)",
+            [nameof(BeforeTimeTooltip)] = "Solo incluir mensajes enviados antes de esta hora",
+            [nameof(PartitionLimitLabel)] = "Límite de partición",
+            [nameof(PartitionLimitTooltip)] =
+                "Dividir la salida en particiones, cada una limitada al número de mensajes especificado (p. ej. '100') o tamaño de archivo (p. ej. '10mb')",
+            [nameof(MessageFilterLabel)] = "Filtro de mensajes",
+            [nameof(MessageFilterTooltip)] =
+                "Solo incluir mensajes que satisfagan este filtro (p. ej. 'from:foo#1234' o 'has:image'). Consulte la documentación para más información.",
+            [nameof(FormatMarkdownLabel)] = "Formatear markdown",
+            [nameof(FormatMarkdownTooltip)] =
+                "Procesar markdown, menciones y otros tokens especiales",
+            [nameof(DownloadAssetsLabel)] = "Descargar recursos",
+            [nameof(DownloadAssetsTooltip)] =
+                "Descargar los recursos referenciados por la exportación (avatares, archivos adjuntos, imágenes incrustadas, etc.)",
+            [nameof(ReuseAssetsLabel)] = "Reutilizar recursos",
+            [nameof(ReuseAssetsTooltip)] =
+                "Reutilizar recursos previamente descargados para evitar solicitudes redundantes",
+            [nameof(AssetsDirPathLabel)] = "Ruta del directorio de recursos",
+            [nameof(AssetsDirPathTooltip)] =
+                "Descargar recursos en este directorio. Si no se especifica, la ruta se derivará de la ruta de salida.",
+            [nameof(AdvancedOptionsTooltip)] = "Alternar opciones avanzadas",
+            [nameof(ExportButton)] = "EXPORTAR",
+            // Common buttons
+            [nameof(CloseButton)] = "CERRAR",
+            [nameof(CancelButton)] = "CANCELAR",
+            // Dialog messages
+            [nameof(UkraineSupportTitle)] = "¡Gracias por apoyar a Ucrania!",
+            [nameof(UkraineSupportMessage)] = """
+                Mientras Rusia libra una guerra genocida contra mi país, estoy agradecido con todos los que continúan apoyando a Ucrania en nuestra lucha por la libertad.
+
+                Haga clic en MÁS INFORMACIÓN para encontrar formas de ayudar.
+                """,
+            [nameof(LearnMoreButton)] = "MÁS INFORMACIÓN",
+            [nameof(UnstableBuildTitle)] = "Advertencia de versión inestable",
+            [nameof(UnstableBuildMessage)] = """
+                Está usando una versión de desarrollo de {0}. Estas versiones no han sido probadas exhaustivamente y pueden contener errores.
+
+                Las actualizaciones automáticas están desactivadas para las versiones de desarrollo.
+
+                Haga clic en VER VERSIONES si desea descargar una versión estable.
+                """,
+            [nameof(SeeReleasesButton)] = "VER VERSIONES",
+            [nameof(UpdateDownloadingMessage)] = "Descargando actualización a {0} v{1}...",
+            [nameof(UpdateReadyMessage)] =
+                "La actualización se ha descargado y se instalará al salir",
+            [nameof(UpdateInstallNowButton)] = "INSTALAR AHORA",
+            [nameof(UpdateFailedMessage)] = "Error al realizar la actualización de la aplicación",
+            [nameof(ErrorPullingServersTitle)] = "Error al cargar servidores",
+            [nameof(ErrorPullingChannelsTitle)] = "Error al cargar canales",
+            [nameof(ErrorExportingTitle)] = "Error al exportar canal(es)",
+            [nameof(SuccessfulExportMessage)] = "{0} canal(es) exportado(s) con éxito",
+        };
+}
--- a/DiscordChatExporter.Gui/Localization/LocalizationManager.Ukrainian.cs
+++ b/DiscordChatExporter.Gui/Localization/LocalizationManager.Ukrainian.cs
@@ -0,0 +1,98 @@
+using System.Collections.Generic;
+
+namespace DiscordChatExporter.Gui.Localization;
+
+public partial class LocalizationManager
+{
+    private static readonly IReadOnlyDictionary<string, string> UkrainianLocalization =
+        new Dictionary<string, string>
+        {
+            // Dashboard
+            [nameof(PullGuildsTooltip)] = "Завантажити доступні сервери та канали (Enter)",
+            [nameof(SettingsTooltip)] = "Налаштування",
+            [nameof(LastMessageSentTooltip)] = "Останнє повідомлення:",
+            // Settings
+            [nameof(SettingsTitle)] = "Налаштування",
+            [nameof(ThemeLabel)] = "Тема",
+            [nameof(ThemeTooltip)] = "Бажана тема інтерфейсу",
+            [nameof(LanguageLabel)] = "Мова",
+            [nameof(LanguageTooltip)] = "Бажана мова інтерфейсу",
+            [nameof(AutoUpdateLabel)] = "Авто-оновлення",
+            [nameof(AutoUpdateTooltip)] = "Виконувати автоматичні оновлення при кожному запуску",
+            [nameof(PersistTokenLabel)] = "Зберігати токен",
+            [nameof(PersistTokenTooltip)] =
+                "Зберігати останній використаний токен у файлі для збереження між сеансами",
+            [nameof(RateLimitPreferenceLabel)] = "Ліміт запитів",
+            [nameof(RateLimitPreferenceTooltip)] =
+                "Чи дотримуватись рекомендованих лімітів запитів. Якщо вимкнено, будуть дотримуватись лише жорсткі ліміти (тобто відповіді 429).",
+            [nameof(ShowThreadsLabel)] = "Показувати теми",
+            [nameof(ShowThreadsTooltip)] = "Які типи тем показувати у списку каналів",
+            [nameof(LocaleLabel)] = "Локаль",
+            [nameof(LocaleTooltip)] = "Локаль для форматування дат та чисел",
+            [nameof(NormalizeToUtcLabel)] = "Нормалізувати до UTC",
+            [nameof(NormalizeToUtcTooltip)] = "Нормалізувати всі часові мітки до UTC+0",
+            [nameof(ParallelLimitLabel)] = "Паралельний ліміт",
+            [nameof(ParallelLimitTooltip)] = "Скільки каналів може експортуватись одночасно",
+            // Export Setup
+            [nameof(ChannelsSelectedText)] = "каналів вибрано",
+            [nameof(OutputPathLabel)] = "Шлях виведення",
+            [nameof(FormatLabel)] = "Формат",
+            [nameof(FormatTooltip)] = "Формат експорту",
+            [nameof(AfterDateLabel)] = "Після (дата)",
+            [nameof(AfterDateTooltip)] = "Включати лише повідомлення, надіслані після цієї дати",
+            [nameof(BeforeDateLabel)] = "До (дата)",
+            [nameof(BeforeDateTooltip)] = "Включати лише повідомлення, надіслані до цієї дати",
+            [nameof(AfterTimeLabel)] = "Після (час)",
+            [nameof(AfterTimeTooltip)] = "Включати лише повідомлення, надіслані після цього часу",
+            [nameof(BeforeTimeLabel)] = "До (час)",
+            [nameof(BeforeTimeTooltip)] = "Включати лише повідомлення, надіслані до цього часу",
+            [nameof(PartitionLimitLabel)] = "Ліміт розподілу",
+            [nameof(PartitionLimitTooltip)] =
+                "Розділити вивід на частини, кожна обмежена вказаною кількістю повідомлень (напр. '100') або розміром файлу (напр. '10mb')",
+            [nameof(MessageFilterLabel)] = "Фільтр повідомлень",
+            [nameof(MessageFilterTooltip)] =
+                "Включати лише повідомлення, що відповідають цьому фільтру (напр. 'from:foo#1234' або 'has:image'). Дивіться документацію для більш детальної інформації.",
+            [nameof(FormatMarkdownLabel)] = "Форматувати markdown",
+            [nameof(FormatMarkdownTooltip)] =
+                "Обробляти markdown, згадки та інші спеціальні токени",
+            [nameof(DownloadAssetsLabel)] = "Завантажувати ресурси",
+            [nameof(DownloadAssetsTooltip)] =
+                "Завантажувати ресурси, на які посилається експорт (аватари, вкладені файли, вбудовані зображення тощо)",
+            [nameof(ReuseAssetsLabel)] = "Повторно використовувати ресурси",
+            [nameof(ReuseAssetsTooltip)] =
+                "Повторно використовувати раніше завантажені ресурси, щоб уникнути зайвих запитів",
+            [nameof(AssetsDirPathLabel)] = "Шлях до директорії ресурсів",
+            [nameof(AssetsDirPathTooltip)] =
+                "Завантажувати ресурси до цієї директорії. Якщо не вказано, шлях до директорії ресурсів буде визначено з шляху виведення.",
+            [nameof(AdvancedOptionsTooltip)] = "Перемкнути розширені параметри",
+            [nameof(ExportButton)] = "ЕКСПОРТУВАТИ",
+            // Common buttons
+            [nameof(CloseButton)] = "ЗАКРИТИ",
+            [nameof(CancelButton)] = "СКАСУВАТИ",
+            // Dialog messages
+            [nameof(UkraineSupportTitle)] = "Дякуємо за підтримку України!",
+            [nameof(UkraineSupportMessage)] = """
+                Поки Росія веде геноцидну війну проти моєї країни, я вдячний кожному, хто продовжує підтримувати Україну у нашій боротьбі за свободу.
+
+                Натисніть ДІЗНАТИСЬ БІЛЬШЕ, щоб знайти способи допомогти.
+                """,
+            [nameof(LearnMoreButton)] = "ДІЗНАТИСЬ БІЛЬШЕ",
+            [nameof(UnstableBuildTitle)] = "Попередження про нестабільну збірку",
+            [nameof(UnstableBuildMessage)] = """
+                Ви використовуєте збірку розробки {0}. Ці збірки не пройшли ретельного тестування та можуть містити помилки.
+
+                Авто-оновлення вимкнено для збірок розробки.
+
+                Натисніть ПЕРЕГЛЯНУТИ РЕЛІЗИ, щоб завантажити стабільний реліз.
+                """,
+            [nameof(SeeReleasesButton)] = "ПЕРЕГЛЯНУТИ РЕЛІЗИ",
+            [nameof(UpdateDownloadingMessage)] = "Завантаження оновлення {0} v{1}...",
+            [nameof(UpdateReadyMessage)] = "Оновлення завантажено та буде встановлено після виходу",
+            [nameof(UpdateInstallNowButton)] = "ВСТАНОВИТИ ЗАРАЗ",
+            [nameof(UpdateFailedMessage)] = "Не вдалося виконати оновлення програми",
+            [nameof(ErrorPullingServersTitle)] = "Помилка завантаження серверів",
+            [nameof(ErrorPullingChannelsTitle)] = "Помилка завантаження каналів",
+            [nameof(ErrorExportingTitle)] = "Помилка експорту каналу(-ів)",
+            [nameof(SuccessfulExportMessage)] = "Успішно експортовано {0} канал(-ів)",
+        };
+}
--- a/DiscordChatExporter.Gui/Localization/LocalizationManager.cs
+++ b/DiscordChatExporter.Gui/Localization/LocalizationManager.cs
@@ -0,0 +1,158 @@
+using System;
+using System.Globalization;
+using System.Runtime.CompilerServices;
+using CommunityToolkit.Mvvm.ComponentModel;
+using DiscordChatExporter.Gui.Services;
+using DiscordChatExporter.Gui.Utils;
+using DiscordChatExporter.Gui.Utils.Extensions;
+
+namespace DiscordChatExporter.Gui.Localization;
+
+public partial class LocalizationManager : ObservableObject, IDisposable
+{
+    private readonly DisposableCollector _eventRoot = new();
+
+    public LocalizationManager(SettingsService settingsService)
+    {
+        _eventRoot.Add(
+            settingsService.WatchProperty(
+                o => o.Language,
+                () => Language = settingsService.Language,
+                true
+            )
+        );
+
+        _eventRoot.Add(
+            this.WatchProperty(
+                o => o.Language,
+                () =>
+                {
+                    foreach (var propertyName in EnglishLocalization.Keys)
+                        OnPropertyChanged(propertyName);
+                }
+            )
+        );
+    }
+
+    [ObservableProperty]
+    public partial Language Language { get; set; } = Language.System;
+
+    private string Get([CallerMemberName] string? key = null)
+    {
+        if (string.IsNullOrWhiteSpace(key))
+            return string.Empty;
+
+        var localization = Language switch
+        {
+            Language.System =>
+                CultureInfo.CurrentUICulture.ThreeLetterISOLanguageName.ToLowerInvariant() switch
+                {
+                    "ukr" => UkrainianLocalization,
+                    "deu" => GermanLocalization,
+                    "fra" => FrenchLocalization,
+                    "spa" => SpanishLocalization,
+                    _ => EnglishLocalization,
+                },
+            Language.Ukrainian => UkrainianLocalization,
+            Language.German => GermanLocalization,
+            Language.French => FrenchLocalization,
+            Language.Spanish => SpanishLocalization,
+            _ => EnglishLocalization,
+        };
+
+        if (
+            localization.TryGetValue(key, out var value)
+            // English is used as a fallback
+            || EnglishLocalization.TryGetValue(key, out value)
+        )
+        {
+            return value;
+        }
+
+        return $"Missing localization for '{key}'";
+    }
+
+    public void Dispose() => _eventRoot.Dispose();
+}
+
+public partial class LocalizationManager
+{
+    // ---- Dashboard ----
+
+    public string PullGuildsTooltip => Get();
+    public string SettingsTooltip => Get();
+    public string LastMessageSentTooltip => Get();
+
+    // ---- Settings ----
+
+    public string SettingsTitle => Get();
+    public string ThemeLabel => Get();
+    public string ThemeTooltip => Get();
+    public string LanguageLabel => Get();
+    public string LanguageTooltip => Get();
+    public string AutoUpdateLabel => Get();
+    public string AutoUpdateTooltip => Get();
+    public string PersistTokenLabel => Get();
+    public string PersistTokenTooltip => Get();
+    public string RateLimitPreferenceLabel => Get();
+    public string RateLimitPreferenceTooltip => Get();
+    public string ShowThreadsLabel => Get();
+    public string ShowThreadsTooltip => Get();
+    public string LocaleLabel => Get();
+    public string LocaleTooltip => Get();
+    public string NormalizeToUtcLabel => Get();
+    public string NormalizeToUtcTooltip => Get();
+    public string ParallelLimitLabel => Get();
+    public string ParallelLimitTooltip => Get();
+
+    // ---- Export Setup ----
+
+    public string ChannelsSelectedText => Get();
+    public string OutputPathLabel => Get();
+    public string FormatLabel => Get();
+    public string FormatTooltip => Get();
+    public string AfterDateLabel => Get();
+    public string AfterDateTooltip => Get();
+    public string BeforeDateLabel => Get();
+    public string BeforeDateTooltip => Get();
+    public string AfterTimeLabel => Get();
+    public string AfterTimeTooltip => Get();
+    public string BeforeTimeLabel => Get();
+    public string BeforeTimeTooltip => Get();
+    public string PartitionLimitLabel => Get();
+    public string PartitionLimitTooltip => Get();
+    public string MessageFilterLabel => Get();
+    public string MessageFilterTooltip => Get();
+    public string FormatMarkdownLabel => Get();
+    public string FormatMarkdownTooltip => Get();
+    public string DownloadAssetsLabel => Get();
+    public string DownloadAssetsTooltip => Get();
+    public string ReuseAssetsLabel => Get();
+    public string ReuseAssetsTooltip => Get();
+    public string AssetsDirPathLabel => Get();
+    public string AssetsDirPathTooltip => Get();
+    public string AdvancedOptionsTooltip => Get();
+    public string ExportButton => Get();
+
+    // ---- Common buttons ----
+
+    public string CloseButton => Get();
+    public string CancelButton => Get();
+
+    // ---- Dialog messages ----
+
+    public string UkraineSupportTitle => Get();
+    public string UkraineSupportMessage => Get();
+    public string LearnMoreButton => Get();
+    public string UnstableBuildTitle => Get();
+    public string UnstableBuildMessage => Get();
+    public string SeeReleasesButton => Get();
+    public string UpdateDownloadingMessage => Get();
+    public string UpdateReadyMessage => Get();
+    public string UpdateInstallNowButton => Get();
+    public string UpdateFailedMessage => Get();
+    public string ErrorPullingServersTitle => Get();
+    public string ErrorPullingChannelsTitle => Get();
+    public string ErrorExportingTitle => Get();
+    public string SuccessfulExportMessage => Get();
+}
--- a/DiscordChatExporter.Gui/Services/SettingsService.cs
+++ b/DiscordChatExporter.Gui/Services/SettingsService.cs
@@ -6,6 +6,7 @@ using CommunityToolkit.Mvvm.ComponentModel;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Exporting;
 using DiscordChatExporter.Gui.Framework;
+using DiscordChatExporter.Gui.Localization;
 using DiscordChatExporter.Gui.Models;

 namespace DiscordChatExporter.Gui.Services;
@@ -23,6 +24,9 @@ public partial class SettingsService()
    [ObservableProperty]
    public partial ThemeVariant Theme { get; set; }

+    [ObservableProperty]
+    public partial Language Language { get; set; }
+
    [ObservableProperty]
    public partial bool IsAutoUpdateEnabled { get; set; } = true;

--- a/DiscordChatExporter.Gui/ViewModels/Components/DashboardViewModel.cs
+++ b/DiscordChatExporter.Gui/ViewModels/Components/DashboardViewModel.cs
@@ -13,6 +13,7 @@ using DiscordChatExporter.Core.Exceptions;
 using DiscordChatExporter.Core.Exporting;
 using DiscordChatExporter.Core.Utils.Extensions;
 using DiscordChatExporter.Gui.Framework;
+using DiscordChatExporter.Gui.Localization;
 using DiscordChatExporter.Gui.Models;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.Utils;
@@ -38,13 +39,15 @@ public partial class DashboardViewModel : ViewModelBase
        ViewModelManager viewModelManager,
        DialogManager dialogManager,
        SnackbarManager snackbarManager,
-        SettingsService settingsService
+        SettingsService settingsService,
+        LocalizationManager localizationManager
    )
    {
        _viewModelManager = viewModelManager;
        _dialogManager = dialogManager;
        _snackbarManager = snackbarManager;
        _settingsService = settingsService;
+        LocalizationManager = localizationManager;

        _progressMuxer = Progress.CreateMuxer().WithAutoReset();

@@ -70,6 +73,8 @@ public partial class DashboardViewModel : ViewModelBase
    [NotifyCanExecuteChangedFor(nameof(ExportCommand))]
    public partial bool IsBusy { get; set; }

+    public LocalizationManager LocalizationManager { get; }
+
    public ProgressContainer<Percentage> Progress { get; } = new();

    public bool IsProgressIndeterminate => IsBusy && Progress.Current.Fraction is <= 0 or >= 1;
@@ -141,7 +146,7 @@ public partial class DashboardViewModel : ViewModelBase
        catch (Exception ex)
        {
            var dialog = _viewModelManager.CreateMessageBoxViewModel(
-                "Error pulling servers",
+                LocalizationManager.ErrorPullingServersTitle,
                ex.ToString()
            );

@@ -208,7 +213,7 @@ public partial class DashboardViewModel : ViewModelBase
        catch (Exception ex)
        {
            var dialog = _viewModelManager.CreateMessageBoxViewModel(
-                "Error pulling channels",
+                LocalizationManager.ErrorPullingChannelsTitle,
                ex.ToString()
            );

@@ -303,14 +308,17 @@ public partial class DashboardViewModel : ViewModelBase
            if (successfulExportCount > 0)
            {
                _snackbarManager.Notify(
-                    $"Successfully exported {successfulExportCount} channel(s)"
+                    string.Format(
+                        LocalizationManager.SuccessfulExportMessage,
+                        successfulExportCount
+                    )
                );
            }
        }
        catch (Exception ex)
        {
            var dialog = _viewModelManager.CreateMessageBoxViewModel(
-                "Error exporting channel(s)",
+                LocalizationManager.ErrorExportingTitle,
                ex.ToString()
            );

--- a/DiscordChatExporter.Gui/ViewModels/Dialogs/ExportSetupViewModel.cs
+++ b/DiscordChatExporter.Gui/ViewModels/Dialogs/ExportSetupViewModel.cs
@@ -12,15 +12,19 @@ using DiscordChatExporter.Core.Exporting.Filtering;
 using DiscordChatExporter.Core.Exporting.Partitioning;
 using DiscordChatExporter.Core.Utils.Extensions;
 using DiscordChatExporter.Gui.Framework;
+using DiscordChatExporter.Gui.Localization;
 using DiscordChatExporter.Gui.Services;

 namespace DiscordChatExporter.Gui.ViewModels.Dialogs;

 public partial class ExportSetupViewModel(
    DialogManager dialogManager,
-    SettingsService settingsService
+    SettingsService settingsService,
+    LocalizationManager localizationManager
 ) : DialogViewModelBase
 {
+    public LocalizationManager LocalizationManager { get; } = localizationManager;
+
    [ObservableProperty]
    public partial Guild? Guild { get; set; }

--- a/DiscordChatExporter.Gui/ViewModels/Dialogs/SettingsViewModel.cs
+++ b/DiscordChatExporter.Gui/ViewModels/Dialogs/SettingsViewModel.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Utils.Extensions;
 using DiscordChatExporter.Gui.Framework;
+using DiscordChatExporter.Gui.Localization;
 using DiscordChatExporter.Gui.Models;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.Utils;
@@ -16,13 +17,19 @@ public class SettingsViewModel : DialogViewModelBase

    private readonly DisposableCollector _eventRoot = new();

-    public SettingsViewModel(SettingsService settingsService)
+    public SettingsViewModel(
+        SettingsService settingsService,
+        LocalizationManager localizationManager
+    )
    {
        _settingsService = settingsService;
+        LocalizationManager = localizationManager;

        _eventRoot.Add(_settingsService.WatchAllProperties(OnAllPropertiesChanged));
    }

+    public LocalizationManager LocalizationManager { get; }
+
    public IReadOnlyList<ThemeVariant> AvailableThemes { get; } = Enum.GetValues<ThemeVariant>();

    public ThemeVariant Theme
@@ -31,6 +38,14 @@ public class SettingsViewModel : DialogViewModelBase
        set => _settingsService.Theme = value;
    }

+    public IReadOnlyList<Language> AvailableLanguages { get; } = Enum.GetValues<Language>();
+
+    public Language Language
+    {
+        get => _settingsService.Language;
+        set => _settingsService.Language = value;
+    }
+
    public bool IsAutoUpdateEnabled
    {
        get => _settingsService.IsAutoUpdateEnabled;
--- a/DiscordChatExporter.Gui/ViewModels/MainViewModel.cs
+++ b/DiscordChatExporter.Gui/ViewModels/MainViewModel.cs
@@ -4,6 +4,7 @@ using System.Threading.Tasks;
 using Avalonia;
 using CommunityToolkit.Mvvm.Input;
 using DiscordChatExporter.Gui.Framework;
+using DiscordChatExporter.Gui.Localization;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.Utils.Extensions;
 using DiscordChatExporter.Gui.ViewModels.Components;
@@ -15,7 +16,8 @@ public partial class MainViewModel(
    DialogManager dialogManager,
    SnackbarManager snackbarManager,
    SettingsService settingsService,
-    UpdateService updateService
+    UpdateService updateService,
+    LocalizationManager localizationManager
 ) : ViewModelBase
 {
    public string Title { get; } = $"{Program.Name} v{Program.VersionString}";
@@ -28,14 +30,10 @@ public partial class MainViewModel(
            return;

        var dialog = viewModelManager.CreateMessageBoxViewModel(
-            "Thank you for supporting Ukraine!",
-            """
-            As Russia wages a genocidal war against my country, I'm grateful to everyone who continues to stand with Ukraine in our fight for freedom.
-
-            Click LEARN MORE to find ways that you can help.
-            """,
-            "LEARN MORE",
-            "CLOSE"
+            localizationManager.UkraineSupportTitle,
+            localizationManager.UkraineSupportMessage,
+            localizationManager.LearnMoreButton,
+            localizationManager.CloseButton
        );

        // Disable this message in the future
@@ -56,16 +54,10 @@ public partial class MainViewModel(
            return;

        var dialog = viewModelManager.CreateMessageBoxViewModel(
-            "Unstable build warning",
-            $"""
-            You're using a development build of {Program.Name}. These builds are not thoroughly tested and may contain bugs.
-
-            Auto-updates are disabled for development builds.
-
-            Click SEE RELEASES if you want to download a stable release instead.
-            """,
-            "SEE RELEASES",
-            "CLOSE"
+            localizationManager.UnstableBuildTitle,
+            string.Format(localizationManager.UnstableBuildMessage, Program.Name),
+            localizationManager.SeeReleasesButton,
+            localizationManager.CloseButton
        );

        if (await dialogManager.ShowDialogAsync(dialog) == true)
@@ -80,12 +72,18 @@ public partial class MainViewModel(
            if (updateVersion is null)
                return;

-            snackbarManager.Notify($"Downloading update to {Program.Name} v{updateVersion}...");
+            snackbarManager.Notify(
+                string.Format(
+                    localizationManager.UpdateDownloadingMessage,
+                    Program.Name,
+                    updateVersion
+                )
+            );
            await updateService.PrepareUpdateAsync(updateVersion);

            snackbarManager.Notify(
-                "Update has been downloaded and will be installed when you exit",
-                "INSTALL NOW",
+                localizationManager.UpdateReadyMessage,
+                localizationManager.UpdateInstallNowButton,
                () =>
                {
                    updateService.FinalizeUpdate(true);
@@ -98,7 +96,7 @@ public partial class MainViewModel(
        catch
        {
            // Failure to update shouldn't crash the application
-            snackbarManager.Notify("Failed to perform application update");
+            snackbarManager.Notify(localizationManager.UpdateFailedMessage);
        }
    }

--- a/DiscordChatExporter.Gui/Views/Components/DashboardView.axaml
+++ b/DiscordChatExporter.Gui/Views/Components/DashboardView.axaml
@@ -45,7 +45,7 @@
                                Command="{Binding PullGuildsCommand}"
                                IsDefault="True"
                                Theme="{DynamicResource MaterialFlatButton}"
-                                ToolTip.Tip="Pull available servers and channels (Enter)">
+                                ToolTip.Tip="{Binding LocalizationManager.PullGuildsTooltip}">
                                <materialIcons:MaterialIcon
                                    Width="24"
                                    Height="24"
@@ -64,7 +64,7 @@
                    Command="{Binding ShowSettingsCommand}"
                    Foreground="{DynamicResource MaterialDarkForegroundBrush}"
                    Theme="{DynamicResource MaterialFlatButton}"
-                    ToolTip.Tip="Settings">
+                    ToolTip.Tip="{Binding LocalizationManager.SettingsTooltip}">
                    <materialIcons:MaterialIcon
                        Width="24"
                        Height="24"
--- a/DiscordChatExporter.Gui/Views/Dialogs/ExportSetupView.axaml
+++ b/DiscordChatExporter.Gui/Views/Dialogs/ExportSetupView.axaml
@@ -38,7 +38,7 @@
                IsVisible="{Binding !IsSingleChannel}"
                TextTrimming="CharacterEllipsis">
                <Run Text="{Binding Channels.Count, FallbackValue=0, Mode=OneWay}" />
-                <Run Text="channels selected" />
+                <Run Text="{Binding LocalizationManager.ChannelsSelectedText}" />
            </TextBlock>

            <!--  Category and channel name (for single channel)  -->
@@ -69,7 +69,7 @@
                    <!--  Output path  -->
                    <TextBox
                        Margin="16,8"
-                        materialAssists:TextFieldAssist.Label="Output path"
+                        materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.OutputPathLabel}"
                        Text="{Binding OutputPath}"
                        Theme="{DynamicResource FilledTextBox}">
                        <ToolTip.Tip>
@@ -146,11 +146,11 @@
                    <!--  Format  -->
                    <ComboBox
                        Margin="16,8"
-                        materialAssists:ComboBoxAssist.Label="Format"
+                        materialAssists:ComboBoxAssist.Label="{Binding LocalizationManager.FormatLabel}"
                        ItemsSource="{Binding AvailableFormats}"
                        SelectedItem="{Binding SelectedFormat}"
                        Theme="{DynamicResource MaterialFilledComboBox}"
-                        ToolTip.Tip="Export format">
+                        ToolTip.Tip="{Binding LocalizationManager.FormatTooltip}">
                        <ComboBox.ItemTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Converter={x:Static converters:ExportFormatToStringConverter.Instance}}" />
@@ -166,9 +166,9 @@
                                Grid.Row="0"
                                Grid.Column="0"
                                Margin="16,8,8,8"
-                                materialAssists:TextFieldAssist.Label="After (date)"
+                                materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.AfterDateLabel}"
                                SelectedDate="{Binding AfterDate}"
-                                ToolTip.Tip="Only include messages sent after this date">
+                                ToolTip.Tip="{Binding LocalizationManager.AfterDateTooltip}">
                                <DatePicker.Styles>
                                    <Style Selector="DatePicker">
                                        <Style Selector="^ /template/ TextBox#DisplayTextBox">
@@ -181,9 +181,9 @@
                                Grid.Row="0"
                                Grid.Column="1"
                                Margin="8,8,16,8"
-                                materialAssists:TextFieldAssist.Label="Before (date)"
+                                materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.BeforeDateLabel}"
                                SelectedDate="{Binding BeforeDate}"
-                                ToolTip.Tip="Only include messages sent before this date">
+                                ToolTip.Tip="{Binding LocalizationManager.BeforeDateTooltip}">
                                <DatePicker.Styles>
                                    <Style Selector="DatePicker">
                                        <Style Selector="^ /template/ TextBox#DisplayTextBox">
@@ -198,11 +198,11 @@
                                Grid.Row="1"
                                Grid.Column="0"
                                Margin="16,8,8,8"
-                                materialAssists:TextFieldAssist.Label="After (time)"
+                                materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.AfterTimeLabel}"
                                ClockIdentifier="{x:Static utils:Internationalization.AvaloniaClockIdentifier}"
                                IsEnabled="{Binding IsAfterDateSet}"
                                SelectedTime="{Binding AfterTime}"
-                                ToolTip.Tip="Only include messages sent after this time">
+                                ToolTip.Tip="{Binding LocalizationManager.AfterTimeTooltip}">
                                <TimePicker.Styles>
                                    <Style Selector="TimePicker">
                                        <Style Selector="^ /template/ TextBox#PART_DisplayTextBox">
@@ -215,11 +215,11 @@
                                Grid.Row="1"
                                Grid.Column="1"
                                Margin="8,8,16,8"
-                                materialAssists:TextFieldAssist.Label="Before (time)"
+                                materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.BeforeTimeLabel}"
                                ClockIdentifier="{x:Static utils:Internationalization.AvaloniaClockIdentifier}"
                                IsEnabled="{Binding IsBeforeDateSet}"
                                SelectedTime="{Binding BeforeTime}"
-                                ToolTip.Tip="Only include messages sent before this time">
+                                ToolTip.Tip="{Binding LocalizationManager.BeforeTimeTooltip}">
                                <TimePicker.Styles>
                                    <Style Selector="TimePicker">
                                        <Style Selector="^ /template/ TextBox#PART_DisplayTextBox">
@@ -233,25 +233,25 @@
                        <!--  Partitioning  -->
                        <TextBox
                            Margin="16,8"
-                            materialAssists:TextFieldAssist.Label="Partition limit"
+                            materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.PartitionLimitLabel}"
                            Text="{Binding PartitionLimitValue}"
                            Theme="{DynamicResource FilledTextBox}"
-                            ToolTip.Tip="Split the output into partitions, each limited to the specified number of messages (e.g. '100') or file size (e.g. '10mb')" />
+                            ToolTip.Tip="{Binding LocalizationManager.PartitionLimitTooltip}" />

                        <!--  Filtering  -->
                        <TextBox
                            Margin="16,8"
-                            materialAssists:TextFieldAssist.Label="Message filter"
+                            materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.MessageFilterLabel}"
                            Text="{Binding MessageFilterValue}"
                            Theme="{DynamicResource FilledTextBox}"
-                            ToolTip.Tip="Only include messages that satisfy this filter (e.g. 'from:foo#1234' or 'has:image'). See the documentation for more info." />
+                            ToolTip.Tip="{Binding LocalizationManager.MessageFilterTooltip}" />

                        <!--  Markdown formatting  -->
                        <DockPanel
                            Margin="16,8"
                            LastChildFill="False"
-                            ToolTip.Tip="Process markdown, mentions, and other special tokens">
-                            <TextBlock DockPanel.Dock="Left" Text="Format markdown" />
+                            ToolTip.Tip="{Binding LocalizationManager.FormatMarkdownTooltip}">
+                            <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.FormatMarkdownLabel}" />
                            <ToggleSwitch DockPanel.Dock="Right" IsChecked="{Binding ShouldFormatMarkdown}" />
                        </DockPanel>

@@ -259,8 +259,8 @@
                        <DockPanel
                            Margin="16,8"
                            LastChildFill="False"
-                            ToolTip.Tip="Download assets referenced by the export (user avatars, attached files, embedded images, etc.)">
-                            <TextBlock DockPanel.Dock="Left" Text="Download assets" />
+                            ToolTip.Tip="{Binding LocalizationManager.DownloadAssetsTooltip}">
+                            <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.DownloadAssetsLabel}" />
                            <ToggleSwitch DockPanel.Dock="Right" IsChecked="{Binding ShouldDownloadAssets}" />
                        </DockPanel>

@@ -269,19 +269,19 @@
                            Margin="16,8"
                            IsEnabled="{Binding ShouldDownloadAssets}"
                            LastChildFill="False"
-                            ToolTip.Tip="Reuse previously downloaded assets to avoid redundant requests">
-                            <TextBlock DockPanel.Dock="Left" Text="Reuse assets" />
+                            ToolTip.Tip="{Binding LocalizationManager.ReuseAssetsTooltip}">
+                            <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.ReuseAssetsLabel}" />
                            <ToggleSwitch DockPanel.Dock="Right" IsChecked="{Binding ShouldReuseAssets}" />
                        </DockPanel>

                        <!--  Assets path  -->
                        <TextBox
                            Margin="16,8"
-                            materialAssists:TextFieldAssist.Label="Assets directory path"
+                            materialAssists:TextFieldAssist.Label="{Binding LocalizationManager.AssetsDirPathLabel}"
                            IsEnabled="{Binding ShouldDownloadAssets}"
                            Text="{Binding AssetsDirPath}"
                            Theme="{DynamicResource FilledTextBox}"
-                            ToolTip.Tip="Download assets to this directory. If not specified, the asset directory path will be derived from the output path.">
+                            ToolTip.Tip="{Binding LocalizationManager.AssetsDirPathTooltip}">
                            <TextBox.InnerRightContent>
                                <Button
                                    Margin="8,8,8,6"
@@ -310,7 +310,7 @@
                Grid.Column="0"
                IsChecked="{Binding IsAdvancedSectionDisplayed}"
                Theme="{DynamicResource MaterialOutlineButton}"
-                ToolTip.Tip="Toggle advanced options">
+                ToolTip.Tip="{Binding LocalizationManager.AdvancedOptionsTooltip}">
                <Button.Styles>
                    <Style Selector="ToggleButton">
                        <Setter Property="Content" Value="MORE" />
@@ -325,14 +325,14 @@
            <Button
                Grid.Column="2"
                Command="{Binding ConfirmCommand}"
-                Content="EXPORT"
+                Content="{Binding LocalizationManager.ExportButton}"
                IsDefault="True"
                Theme="{DynamicResource MaterialOutlineButton}" />
            <Button
                Grid.Column="3"
                Margin="16,0,0,0"
                Command="{Binding CloseCommand}"
-                Content="CANCEL"
+                Content="{Binding LocalizationManager.CancelButton}"
                IsCancel="True"
                Theme="{DynamicResource MaterialOutlineButton}" />
        </Grid>
--- a/DiscordChatExporter.Gui/Views/Dialogs/SettingsView.axaml
+++ b/DiscordChatExporter.Gui/Views/Dialogs/SettingsView.axaml
@@ -12,7 +12,7 @@
            Margin="16"
            FontSize="19"
            FontWeight="Light"
-            Text="Settings" />
+            Text="{Binding LocalizationManager.SettingsTitle}" />

        <Border
            Grid.Row="1"
@@ -25,8 +25,8 @@
                    <DockPanel
                        Margin="16,8"
                        LastChildFill="False"
-                        ToolTip.Tip="Preferred user interface theme">
-                        <TextBlock DockPanel.Dock="Left" Text="Theme" />
+                        ToolTip.Tip="{Binding LocalizationManager.ThemeTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.ThemeLabel}" />
                        <ComboBox
                            Width="150"
                            DockPanel.Dock="Right"
@@ -34,14 +34,27 @@
                            SelectedItem="{Binding Theme}" />
                    </DockPanel>

+                    <!--  Language  -->
+                    <DockPanel
+                        Margin="16,8"
+                        LastChildFill="False"
+                        ToolTip.Tip="{Binding LocalizationManager.LanguageTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.LanguageLabel}" />
+                        <ComboBox
+                            Width="150"
+                            DockPanel.Dock="Right"
+                            ItemsSource="{Binding AvailableLanguages}"
+                            SelectedItem="{Binding Language}" />
+                    </DockPanel>
+
                    <!--  Auto-updates  -->
                    <DockPanel
                        Margin="16,8"
                        IsVisible="{OnPlatform False,
                                               Windows=True}"
                        LastChildFill="False"
-                        ToolTip.Tip="Perform automatic updates on every launch">
-                        <TextBlock DockPanel.Dock="Left" Text="Auto-update" />
+                        ToolTip.Tip="{Binding LocalizationManager.AutoUpdateTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.AutoUpdateLabel}" />
                        <ToggleSwitch DockPanel.Dock="Right" IsChecked="{Binding IsAutoUpdateEnabled}" />
                    </DockPanel>

@@ -49,8 +62,8 @@
                    <DockPanel
                        Margin="16,8"
                        LastChildFill="False"
-                        ToolTip.Tip="Save the last used token to a file so that it can be persisted between sessions">
-                        <TextBlock DockPanel.Dock="Left" Text="Persist token" />
+                        ToolTip.Tip="{Binding LocalizationManager.PersistTokenTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.PersistTokenLabel}" />
                        <ToggleSwitch DockPanel.Dock="Right" IsChecked="{Binding IsTokenPersisted}" />
                    </DockPanel>

@@ -58,8 +71,8 @@
                    <DockPanel
                        Margin="16,8"
                        LastChildFill="False"
-                        ToolTip.Tip="Whether to respect advisory rate limits. If disabled, only hard rate limits (i.e. 429 responses) will be respected.">
-                        <TextBlock DockPanel.Dock="Left" Text="Rate limit preference" />
+                        ToolTip.Tip="{Binding LocalizationManager.RateLimitPreferenceTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.RateLimitPreferenceLabel}" />
                        <ComboBox
                            Width="150"
                            DockPanel.Dock="Right"
@@ -77,8 +90,8 @@
                    <DockPanel
                        Margin="16,8"
                        LastChildFill="False"
-                        ToolTip.Tip="Which types of threads to show in the channel list">
-                        <TextBlock DockPanel.Dock="Left" Text="Show threads" />
+                        ToolTip.Tip="{Binding LocalizationManager.ShowThreadsTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.ShowThreadsLabel}" />
                        <ComboBox
                            Width="150"
                            DockPanel.Dock="Right"
@@ -90,8 +103,8 @@
                    <DockPanel
                        Margin="16,8"
                        LastChildFill="False"
-                        ToolTip.Tip="Locale to use when formatting dates and numbers">
-                        <TextBlock DockPanel.Dock="Left" Text="Locale" />
+                        ToolTip.Tip="{Binding LocalizationManager.LocaleTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.LocaleLabel}" />
                        <ComboBox
                            Width="150"
                            DockPanel.Dock="Right"
@@ -109,8 +122,8 @@
                    <DockPanel
                        Margin="16,8"
                        LastChildFill="False"
-                        ToolTip.Tip="Normalize all timestamps to UTC+0">
-                        <TextBlock DockPanel.Dock="Left" Text="Normalize to UTC" />
+                        ToolTip.Tip="{Binding LocalizationManager.NormalizeToUtcTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.NormalizeToUtcLabel}" />
                        <ToggleSwitch DockPanel.Dock="Right" IsChecked="{Binding IsUtcNormalizationEnabled}" />
                    </DockPanel>

@@ -118,8 +131,8 @@
                    <DockPanel
                        Margin="16,8"
                        LastChildFill="False"
-                        ToolTip.Tip="How many channels can be exported at the same time">
-                        <TextBlock DockPanel.Dock="Left" Text="Parallel limit" />
+                        ToolTip.Tip="{Binding LocalizationManager.ParallelLimitTooltip}">
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding LocalizationManager.ParallelLimitLabel}" />
                        <StackPanel DockPanel.Dock="Right" Orientation="Horizontal">
                            <TextBlock Margin="10,0" Text="{Binding ParallelLimit}" />
                            <Slider
@@ -141,7 +154,7 @@
            Margin="16"
            HorizontalAlignment="Stretch"
            Command="{Binding CloseCommand}"
-            Content="CLOSE"
+            Content="{Binding LocalizationManager.CloseButton}"
            IsCancel="True"
            IsDefault="True"
            Theme="{DynamicResource MaterialOutlineButton}" />