Truncate ISO-639-2 language display names at first delimiter

Prevents raw ISO-639-2 values (e.g. "Greek, Modern (1453-)" from cluttering the audio and subtitle display names by truncating them at the first comma or semicolon ("Greek"). Applies to MediaStreamRepository and ProbeResultNormalizer.

Jellyfin.Server.Implementations/Item/MediaStreamRepository.cs

@@ -173,7 +173,10 @@ public class MediaStreamRepository : IMediaStreamRepository
             if (!string.IsNullOrEmpty(dto.Language))
             {
                 var culture = _localization.FindLanguageInfo(dto.Language);
-                dto.LocalizedLanguage = culture?.DisplayName;
+                // Truncate at the first delimiter to avoid cluttered display names
+                dto.LocalizedLanguage = culture?.DisplayName is { } name
+                    ? name.Split(';', ',')[0].Trim()
+                    : null;
             }
 
             if (dto.Type is MediaStreamType.Audio)

MediaBrowser.MediaEncoding/Probing/ProbeResultNormalizer.cs

@@ -732,7 +732,9 @@ namespace MediaBrowser.MediaEncoding.Probing
                 stream.LocalizedOriginal = _localization.GetLocalizedString("Original");
                 stream.LocalizedLanguage = string.IsNullOrEmpty(stream.Language)
                     ? null
-                    : _localization.FindLanguageInfo(stream.Language)?.DisplayName;
+                    : _localization.FindLanguageInfo(stream.Language)?.DisplayName is { } name
+                        ? name.Split(';', ',')[0].Trim()
+                        : null;
 
                 stream.Channels = streamInfo.Channels;
 
@@ -773,7 +775,9 @@ namespace MediaBrowser.MediaEncoding.Probing
                 stream.LocalizedHearingImpaired = _localization.GetLocalizedString("HearingImpaired");
                 stream.LocalizedLanguage = string.IsNullOrEmpty(stream.Language)
                     ? null
-                    : _localization.FindLanguageInfo(stream.Language)?.DisplayName;
+                    : _localization.FindLanguageInfo(stream.Language)?.DisplayName is { } name
+                        ? name.Split(';', ',')[0].Trim()
+                        : null;
 
                 if (string.IsNullOrEmpty(stream.Title))
                 {