Add language-aware article sorting

src/Jellyfin.Plugin.Multilang/Api/MultilangController.cs

@@ -17,6 +17,7 @@ using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Net;
 using MediaBrowser.Controller.Session;
+using MediaBrowser.Model.Globalization;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 
@@ -42,6 +43,7 @@ public sealed class MultilangController : ControllerBase
     private readonly IUserManager _userManager;
     private readonly IHttpClientFactory _httpClientFactory;
     private readonly IApplicationPaths _appPaths;
+    private readonly ILocalizationManager _localizationManager;
     private readonly ProviderCatalog _providerCatalog;
     private readonly SortArticleCatalog _articleCatalog;
     private readonly RefreshService _refreshService;
@@ -59,6 +61,7 @@ public sealed class MultilangController : ControllerBase
         IUserManager userManager,
         IHttpClientFactory httpClientFactory,
         IApplicationPaths appPaths,
+        ILocalizationManager localizationManager,
         ProviderCatalog providerCatalog,
         SortArticleCatalog articleCatalog,
         RefreshService refreshService,
@@ -75,6 +78,7 @@ public sealed class MultilangController : ControllerBase
         _userManager = userManager;
         _httpClientFactory = httpClientFactory;
         _appPaths = appPaths;
+        _localizationManager = localizationManager;
         _providerCatalog = providerCatalog;
         _articleCatalog = articleCatalog;
         _refreshService = refreshService;
@@ -111,6 +115,13 @@ public sealed class MultilangController : ControllerBase
     public IActionResult ArticleBuiltins()
         => Ok(_articleCatalog.GetBuiltIns().OrderBy(k => k.Key, StringComparer.OrdinalIgnoreCase).ToDictionary(k => k.Key, v => v.Value));
 
+    [HttpGet("MetadataLanguages")]
+    public IActionResult MetadataLanguages()
+        => Ok(_localizationManager.GetCultures()
+            .Where(c => !string.IsNullOrWhiteSpace(c.Name))
+            .OrderBy(c => c.DisplayName, StringComparer.OrdinalIgnoreCase)
+            .Select(c => new { c.Name, c.DisplayName }));
+
     [HttpGet("AdminConfig")]
     public async Task<IActionResult> AdminConfig()
     {
@@ -143,6 +154,8 @@ public sealed class MultilangController : ControllerBase
     private static bool AdminConfigAffectsCachedItems(PluginConfiguration previous, PluginConfiguration next)
         => !StringArrayEquals(previous.Languages, next.Languages, StringComparer.OrdinalIgnoreCase) ||
            !string.Equals(previous.AssetStorageMode, next.AssetStorageMode, StringComparison.OrdinalIgnoreCase) ||
+           previous.IgnoreArticlesWhenSorting != next.IgnoreArticlesWhenSorting ||
+           !string.Equals(previous.JellyfinTitleLanguageFallback, next.JellyfinTitleLanguageFallback, StringComparison.OrdinalIgnoreCase) ||
            !ArticleEntriesEqual(previous.ArticleEntries, next.ArticleEntries);
 
     private static bool StringArrayEquals(string[] previous, string[] next, StringComparer comparer)
@@ -1432,6 +1445,10 @@ public sealed class AdminConfigDto
 
     public string AssetStorageMode { get; set; } = "url";
 
+    public bool IgnoreArticlesWhenSorting { get; set; } = true;
+
+    public string JellyfinTitleLanguageFallback { get; set; } = string.Empty;
+
     public SortArticleEntry[] ArticleEntries { get; set; } = [];
 
     public bool EnableLogging { get; set; }
@@ -1453,6 +1470,8 @@ public sealed class AdminConfigDto
             ItemsProxyCacheTtlMinutes = cfg.ItemsProxyCacheTtlMinutes,
             ItemsProxyCacheMaxMiB = cfg.ItemsProxyCacheMaxMiB,
             AssetStorageMode = NormalizeAssetStorageMode(cfg.AssetStorageMode),
+            IgnoreArticlesWhenSorting = cfg.IgnoreArticlesWhenSorting,
+            JellyfinTitleLanguageFallback = cfg.JellyfinTitleLanguageFallback,
             ArticleEntries = cfg.ArticleEntries,
             EnableLogging = cfg.EnableLogging,
             VerboseLogging = cfg.VerboseLogging,
@@ -1475,6 +1494,8 @@ public sealed class AdminConfigDto
             ItemsProxyCacheTtlMinutes = Math.Max(1, ItemsProxyCacheTtlMinutes),
             ItemsProxyCacheMaxMiB = Math.Max(1, ItemsProxyCacheMaxMiB),
             AssetStorageMode = NormalizeAssetStorageMode(AssetStorageMode),
+            IgnoreArticlesWhenSorting = IgnoreArticlesWhenSorting,
+            JellyfinTitleLanguageFallback = JellyfinTitleLanguageFallback?.Trim() ?? string.Empty,
             ArticleEntries = ArticleEntries
                 .Where(e => !string.IsNullOrWhiteSpace(e.Language))
                 .Select(e => new SortArticleEntry { Language = e.Language.Trim(), Articles = e.Articles ?? string.Empty, AlwaysApply = e.AlwaysApply })

src/Jellyfin.Plugin.Multilang/Configuration/PluginConfiguration.cs

@@ -29,6 +29,10 @@ public sealed class PluginConfiguration : BasePluginConfiguration
 
     public string AssetStorageMode { get; set; } = "url";
 
+    public bool IgnoreArticlesWhenSorting { get; set; } = true;
+
+    public string JellyfinTitleLanguageFallback { get; set; } = string.Empty;
+
     [XmlArray("SortArticles")]
     [XmlArrayItem("SortArticleEntry")]
     public SortArticleEntry[] ArticleEntries { get; set; } = [];

src/Jellyfin.Plugin.Multilang/Configuration/configPage.html

@@ -28,16 +28,25 @@
       </fieldset>
 
       <fieldset class="ml-section">
-        <legend>Languages</legend>
+        <legend>Languages to fetch</legend>
         <div class="inputContainer">
-          <label class="inputLabel inputLabelUnfocused" for="ml-languages">Languages</label>
+          <label class="inputLabel inputLabelUnfocused" for="ml-languages">Languages to fetch</label>
           <input id="ml-languages" type="text" class="emby-input ml-input" placeholder="en-US, fi-FI, sv-SE">
           <div class="fieldDescription">Use BCP-47 language tags. These are the languages refresh jobs fetch and user rules can select.</div>
         </div>
 
+        <div class="inputContainer">
+          <label><input id="ml-ignore-articles" type="checkbox"> Ignore articles when sorting</label>
+        </div>
+        <div id="ml-jellyfin-title-language-row" class="inputContainer ml-article-sorting-fallback">
+          <label class="inputLabel inputLabelUnfocused" for="ml-jellyfin-title-language">When in doubt, assume title language is</label>
+          <select id="ml-jellyfin-title-language" is="emby-select" class="emby-select-withcolor emby-select ml-input"></select>
+        </div>
+
         <details id="ml-article-details" class="ml-articles">
-          <summary>Articles</summary>
+          <summary>List of articles</summary>
           <div class="fieldDescription">Comma- or semicolon-separated leading articles to ignore per language.</div>
+          <div class="fieldDescription">To ignore a language's articles, even on titles in other languages, check "Always ignore".</div>
           <div id="ml-article-list" class="ml-articles-list"></div>
           <div class="ml-articles-actions">
             <button id="ml-article-add" is="emby-button" type="button" class="raised"><span>Add language</span></button>
@@ -179,7 +188,7 @@
     <script>
       (function () {
         var M = window.Multilang;
-        var state = { config: null, providers: [], articles: {} };
+        var state = { config: null, providers: [], articles: {}, metadataLanguages: [] };
         var page = document.getElementById("ml-admin");
         var form = document.getElementById("ml-admin-form");
         var status = document.getElementById("ml-status");
@@ -226,6 +235,38 @@
           return String(value || "").trim().toLowerCase().replace(/_/g, "-");
         }
 
+        function renderJellyfinTitleLanguages() {
+          var select = document.getElementById("ml-jellyfin-title-language");
+          var selected = state.config.JellyfinTitleLanguageFallback || state.config.jellyfinTitleLanguageFallback || "";
+          select.replaceChildren();
+          var defaultOption = make("option", "", "Jellyfin's default");
+          defaultOption.value = "";
+          select.appendChild(defaultOption);
+          var separator = make("option", "", "--------------------");
+          separator.disabled = true;
+          select.appendChild(separator);
+          state.metadataLanguages.forEach(function (language) {
+            var name = String(language.Name || language.name || "");
+            if (!name) return;
+            var option = make("option", "", String(language.DisplayName || language.displayName || name) + " (" + name + ")");
+            option.value = name;
+            select.appendChild(option);
+          });
+          if (selected && !Array.prototype.some.call(select.options, function (option) { return option.value === selected; })) {
+            var unknown = make("option", "", selected);
+            unknown.value = selected;
+            select.appendChild(unknown);
+          }
+          select.value = selected;
+        }
+
+        function syncArticleSortingControls() {
+          var enabled = document.getElementById("ml-ignore-articles").checked;
+          var row = document.getElementById("ml-jellyfin-title-language-row");
+          row.classList.toggle("ml-disabled", !enabled);
+          document.getElementById("ml-jellyfin-title-language").disabled = !enabled;
+        }
+
         function syncProviderSourceWidth() {
           var sources = Array.prototype.slice.call(page.querySelectorAll(".ml-provider-source"));
           if (!sources.length) return;
@@ -316,7 +357,7 @@
           var alwaysInput = make("input", "ml-articles-apply-toggle");
           alwaysInput.type = "checkbox";
           alwaysInput.checked = !!alwaysApply;
-          always.append(alwaysInput, make("span", "", "Always"));
+          always.append(alwaysInput, make("span", "", "Always ignore"));
           var remove = make("button", "raised ml-articles-remove");
           remove.type = "button";
           remove.setAttribute("is", "emby-button");
@@ -383,6 +424,8 @@
           state.config.ItemsProxyCacheTtlMinutes = Number(document.getElementById("ml-cache-ttl").value || 1);
           state.config.ItemsProxyCacheMaxMiB = Number(document.getElementById("ml-cache-max").value || 1);
           state.config.AssetStorageMode = nextStorageMode;
+          state.config.IgnoreArticlesWhenSorting = document.getElementById("ml-ignore-articles").checked;
+          state.config.JellyfinTitleLanguageFallback = document.getElementById("ml-jellyfin-title-language").value;
           state.config.EnableLogging = document.getElementById("ml-log-enabled").checked || document.getElementById("ml-log-verbose").checked;
           state.config.VerboseLogging = document.getElementById("ml-log-verbose").checked;
           state.config.CleanupDataOnUninstall = document.getElementById("ml-cleanup-uninstall").checked;
@@ -405,11 +448,14 @@
           document.getElementById("ml-cache-ttl").value = state.config.ItemsProxyCacheTtlMinutes ?? 120;
           document.getElementById("ml-cache-max").value = state.config.ItemsProxyCacheMaxMiB ?? 50;
           document.getElementById("ml-asset-storage").value = (state.config.AssetStorageMode || state.config.assetStorageMode || "url").toLowerCase() === "local" ? "local" : "url";
+          document.getElementById("ml-ignore-articles").checked = state.config.IgnoreArticlesWhenSorting !== false && state.config.ignoreArticlesWhenSorting !== false;
           document.getElementById("ml-log-enabled").checked = !!state.config.EnableLogging;
           document.getElementById("ml-log-verbose").checked = !!state.config.VerboseLogging;
           document.getElementById("ml-cleanup-uninstall").checked = !!state.config.CleanupDataOnUninstall;
           renderProviderInputs();
           renderProviderBuckets();
+          renderJellyfinTitleLanguages();
+          syncArticleSortingControls();
           renderArticles();
           loadCacheDiagnostics();
           loadRefreshDiagnostics();
@@ -716,11 +762,13 @@
             var all = await Promise.all([
               M.get("/Multilang/Providers"),
               M.get("/Multilang/ArticleBuiltins"),
+              M.get("/Multilang/MetadataLanguages"),
               M.get("/Multilang/AdminConfig")
             ]);
             state.providers = all[0] || [];
             state.articles = all[1] || {};
-            state.config = all[2] || {};
+            state.metadataLanguages = all[2] || [];
+            state.config = all[3] || {};
             loadIntoForm();
             M.setStatus(status, "");
           } catch (err) {
@@ -884,6 +932,7 @@
           document.getElementById("ml-log-verbose").addEventListener("change", function () {
             if (this.checked) document.getElementById("ml-log-enabled").checked = true;
           });
+          document.getElementById("ml-ignore-articles").addEventListener("change", syncArticleSortingControls);
           document.getElementById("ml-article-add").addEventListener("click", function () { addArticleRow("", "", false, false); });
           document.getElementById("ml-article-repair").addEventListener("click", renderArticles);
           document.getElementById("ml-article-reset").addEventListener("click", function () {

src/Jellyfin.Plugin.Multilang/Configuration/shared.css

@@ -297,6 +297,10 @@ select.emby-select option:checked {
   opacity: .7;
 }
 
+.ml-disabled {
+  opacity: .5;
+}
+
 .ml-error {
   color: #ff9b9b;
 }

src/Jellyfin.Plugin.Multilang/Services/ItemsProxySorting.cs

@@ -29,6 +29,9 @@ public static class ItemsProxySorting
     }
 
     public static void Apply(JsonNode root, ItemsProxyControls controls, CultureInfo culture, string[] titleArticles)
+        => Apply(root, controls, culture, _ => titleArticles);
+
+    public static void Apply(JsonNode root, ItemsProxyControls controls, CultureInfo culture, Func<JsonObject, string[]> titleArticlesForItem)
     {
         if (!TryGetItemsArray(root, out var itemsArray))
             return;
@@ -36,9 +39,9 @@ public static class ItemsProxySorting
         var items = itemsArray.OfType<JsonObject>().ToList();
         var specs = BuildSortSpecs(controls.SortBy);
         if (specs.Length > 0 && items.Count > 1)
-            items = Sort(items, specs, controls.SortOrder, culture, titleArticles);
+            items = Sort(items, specs, controls.SortOrder, culture, titleArticlesForItem);
 
-        items = FilterByNameStartsWith(items, controls.NameStartsWith, culture, titleArticles);
+        items = FilterByNameStartsWith(items, controls.NameStartsWith, culture, titleArticlesForItem);
         var filteredCount = items.Count;
         items = Slice(items, controls.StartIndex, controls.Limit);
 
@@ -77,24 +80,45 @@ public static class ItemsProxySorting
         }
     }
 
-    public static string[] GetSortArticles(SortArticleCatalog articleCatalog, IEnumerable<SortArticleEntry> configuredArticles, string? sortLocale)
+    public static string[] GetSortArticles(
+        SortArticleCatalog articleCatalog,
+        IEnumerable<SortArticleEntry> configuredArticles,
+        string? titleLanguage,
+        bool ignoreArticles = true)
     {
-        var locale = (sortLocale ?? string.Empty).Trim();
+        if (!ignoreArticles)
-        if (locale.Length == 0)
+            return [];
-            locale = "en";
 
         var configured = configuredArticles.ToArray();
-        var custom = configured.FirstOrDefault(e => e.Language.Equals(locale, StringComparison.OrdinalIgnoreCase))
+        var always = configured
-                     ?? configured.FirstOrDefault(e => locale.StartsWith(e.Language + "-", StringComparison.OrdinalIgnoreCase));
+            .Where(e => e.AlwaysApply == true)
+            .SelectMany(e => SplitArticles(e.Articles));
+        return always
+            .Concat(GetLanguageArticles(articleCatalog, configured, titleLanguage))
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .ToArray();
+    }
+
+    private static string[] GetLanguageArticles(
+        SortArticleCatalog articleCatalog,
+        SortArticleEntry[] configured,
+        string? titleLanguage)
+    {
+        var language = (titleLanguage ?? string.Empty).Trim();
+        if (language.Length == 0)
+            return [];
+
+        var custom = configured.FirstOrDefault(e => e.Language.Equals(language, StringComparison.OrdinalIgnoreCase))
+                     ?? configured.FirstOrDefault(e => language.StartsWith(e.Language + "-", StringComparison.OrdinalIgnoreCase));
         if (custom is not null)
             return SplitArticles(custom.Articles);
 
         var builtIns = articleCatalog.GetBuiltIns();
-        if (builtIns.TryGetValue(locale, out var exact))
+        if (builtIns.TryGetValue(language, out var exact))
             return exact;
 
-        var dash = locale.IndexOf('-', StringComparison.Ordinal);
+        var dash = language.IndexOf('-', StringComparison.Ordinal);
-        return dash > 0 && builtIns.TryGetValue(locale[..dash], out var languageOnly)
+        return dash > 0 && builtIns.TryGetValue(language[..dash], out var languageOnly)
             ? languageOnly
             : [];
     }
@@ -149,12 +173,12 @@ public static class ItemsProxySorting
             _ => SortKind.Text
         };
 
-    private static List<JsonObject> Sort(List<JsonObject> items, SortSpec[] specs, string sortOrder, CultureInfo culture, string[] titleArticles)
+    private static List<JsonObject> Sort(List<JsonObject> items, SortSpec[] specs, string sortOrder, CultureInfo culture, Func<JsonObject, string[]> titleArticlesForItem)
     {
         var descending = sortOrder.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
             .FirstOrDefault()?.Equals("Descending", StringComparison.OrdinalIgnoreCase) == true;
         var comparer = StringComparer.Create(culture, true);
-        var values = items.Select(item => new { Item = item, Values = specs.Select(spec => ValueFor(item, spec, culture, titleArticles)).ToArray() }).ToList();
+        var values = items.Select(item => new { Item = item, Values = specs.Select(spec => ValueFor(item, spec, culture, titleArticlesForItem(item))).ToArray() }).ToList();
 
         values.Sort((left, right) =>
         {
@@ -197,14 +221,14 @@ public static class ItemsProxySorting
 
     private readonly record struct SortValue(bool HasValue, string Text, double Number);
 
-    private static List<JsonObject> FilterByNameStartsWith(List<JsonObject> items, string prefix, CultureInfo culture, string[] titleArticles)
+    private static List<JsonObject> FilterByNameStartsWith(List<JsonObject> items, string prefix, CultureInfo culture, Func<JsonObject, string[]> titleArticlesForItem)
     {
         prefix = (prefix ?? string.Empty).Trim();
         if (prefix.Length == 0)
             return items;
 
         return items
-            .Where(i => culture.CompareInfo.IsPrefix(StripArticle(GetString(i, "Name"), titleArticles), prefix, CompareOptions.IgnoreCase))
+            .Where(i => culture.CompareInfo.IsPrefix(StripArticle(GetString(i, "Name"), titleArticlesForItem(i)), prefix, CompareOptions.IgnoreCase))
             .ToList();
     }
 
@@ -227,8 +251,9 @@ public static class ItemsProxySorting
             var word = article.Trim();
             if (word.Length == 0 || text.Length <= word.Length)
                 continue;
-            if (text.StartsWith(word + " ", StringComparison.OrdinalIgnoreCase))
+            var attachedArticle = word.EndsWith("'", StringComparison.Ordinal);
-                return text[(word.Length + 1)..].TrimStart();
+            if (text.StartsWith(word + (attachedArticle ? string.Empty : " "), StringComparison.OrdinalIgnoreCase))
+                return text[word.Length..].TrimStart();
         }
 
         return text;

src/Jellyfin.Plugin.Multilang/Services/ItemsProxyTransformer.cs

@@ -13,7 +13,7 @@ namespace Jellyfin.Plugin.Multilang.Services;
 
 public readonly record struct ItemsProxyTransformResult(string Body, string[] ItemIds);
 
-public readonly record struct ItemsProxyResolvedText(bool Change, string? Value);
+public readonly record struct ItemsProxyResolvedText(bool Change, string? Value, string? Language = null);
 
 public readonly record struct ItemsProxyResolvedAsset(bool Change, string? Value);
 
@@ -61,9 +61,9 @@ public sealed class ItemsProxyTransformer
         if (ids.Length == 0)
             return new ItemsProxyTransformResult(body, ids);
 
+        var config = Plugin.Instance?.Configuration ?? new PluginConfiguration();
         var sortLocale = ItemsProxySorting.ResolveSortLocale(rules.SortLocale, controls.ClientLocale);
         var sortCulture = ItemsProxySorting.GetSortCulture(sortLocale);
-        var sortArticles = ItemsProxySorting.GetSortArticles(_articleCatalog, Plugin.Instance?.Configuration?.ArticleEntries ?? [], sortLocale);
 
         var localGenreIds = rules.Enabled ? ItemsProxyRequestBuilder.ParseLocalGenreIds(controls.GenreIds) : [];
         if (rules.Enabled || localGenreIds.Length > 0)
@@ -80,10 +80,19 @@ public sealed class ItemsProxyTransformer
             ids = GetItemIds(items);
         }
 
-        if (rules.Enabled)
+        var titleLanguages = rules.Enabled
-            ApplyRules(items, ids, rules, controls.ClientLocale, factsByItem);
+            ? ApplyRules(items, ids, rules, controls.ClientLocale, factsByItem)
+            : new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        var jellyfinTitleLanguages = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
 
-        ItemsProxySorting.Apply(root, controls, sortCulture, sortArticles);
+        ItemsProxySorting.Apply(root, controls, sortCulture, item =>
+        {
+            var itemId = TryGetItemId(item);
+            var language = itemId is not null && titleLanguages.TryGetValue(itemId, out var translatedLanguage)
+                ? translatedLanguage
+                : ResolveJellyfinTitleLanguage(itemId, config, jellyfinTitleLanguages);
+            return ItemsProxySorting.GetSortArticles(_articleCatalog, config.ArticleEntries, language, config.IgnoreArticlesWhenSorting);
+        });
         return new ItemsProxyTransformResult(root.ToJsonString(new JsonSerializerOptions { WriteIndented = false }), ids);
     }
 
@@ -230,12 +239,12 @@ public sealed class ItemsProxyTransformer
             if (field.Equals(TitleField, StringComparison.OrdinalIgnoreCase) &&
                 action.Equals(OriginalAction, StringComparison.OrdinalIgnoreCase) &&
                 !string.IsNullOrWhiteSpace(facts.OriginalTitle))
-                return new ItemsProxyResolvedText(true, facts.OriginalTitle);
+                return new ItemsProxyResolvedText(true, facts.OriginalTitle, facts.OriginalLanguage);
             if (action.Equals(OriginalAction, StringComparison.OrdinalIgnoreCase))
             {
                 var originalValue = GetTranslatedField(byLang, OriginalAction, field);
                 if (!string.IsNullOrWhiteSpace(originalValue))
-                    return new ItemsProxyResolvedText(true, originalValue);
+                    return new ItemsProxyResolvedText(true, originalValue, facts.OriginalLanguage);
                 continue;
             }
 
@@ -244,7 +253,7 @@ public sealed class ItemsProxyTransformer
 
             var value = GetTranslatedField(byLang, action[LanguagePrefix.Length..], field);
             if (!string.IsNullOrWhiteSpace(value))
-                return new ItemsProxyResolvedText(true, value);
+                return new ItemsProxyResolvedText(true, value, action[LanguagePrefix.Length..]);
         }
 
         return field.Equals(TitleField, StringComparison.OrdinalIgnoreCase)
@@ -347,7 +356,7 @@ public sealed class ItemsProxyTransformer
         return string.Empty;
     }
 
-    private void ApplyRules(
+    private Dictionary<string, string> ApplyRules(
         IEnumerable<JsonObject> items,
         string[] ids,
         UserRulesDocument rules,
@@ -357,6 +366,7 @@ public sealed class ItemsProxyTransformer
         var langs = GetNeededLanguages(rules);
         var translations = _store.GetTranslations(ids, langs);
         var assets = _store.GetAssets(ids, langs);
+        var titleLanguages = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
         var movieGenreNames = _store.GetGenreNames("movie", clientLocale);
         var tvGenreNames = _store.GetGenreNames("tv", clientLocale);
 
@@ -373,6 +383,8 @@ public sealed class ItemsProxyTransformer
             var title = ResolveField(TitleField, GetActionList(rules, category, TitleField), facts, byLang);
             if (title.Change)
                 item["Name"] = title.Value ?? string.Empty;
+            if (!string.IsNullOrWhiteSpace(title.Language))
+                titleLanguages[itemId] = title.Language;
 
             var overview = ResolveField(OverviewField, GetActionList(rules, category, OverviewField), facts, byLang);
             if (overview.Change)
@@ -395,6 +407,27 @@ public sealed class ItemsProxyTransformer
             ApplyBackdropAsset(item, ResolveAsset(BackdropKind, GetActionList(rules, category, BackdropKind), assetsByKind));
             ApplyGenres(item, facts, movieGenreNames, tvGenreNames);
         }
+
+        return titleLanguages;
+    }
+
+    private string ResolveJellyfinTitleLanguage(
+        string? itemId,
+        PluginConfiguration config,
+        Dictionary<string, string> resolvedLanguages)
+    {
+        if (string.IsNullOrWhiteSpace(itemId))
+            return config.JellyfinTitleLanguageFallback;
+
+        if (resolvedLanguages.TryGetValue(itemId, out var existing))
+            return existing;
+
+        var language = Guid.TryParse(itemId, out var itemGuid)
+            ? _libraryManager.GetItemById(itemGuid)?.GetPreferredMetadataLanguage()
+            : null;
+        language = string.IsNullOrWhiteSpace(language) ? config.JellyfinTitleLanguageFallback : language;
+        resolvedLanguages[itemId] = language ?? string.Empty;
+        return resolvedLanguages[itemId];
     }
 
     private static void ApplyImageAsset(JsonObject item, string imageType, ItemsProxyResolvedAsset asset)

tests/Jellyfin.Plugin.Multilang.Tests/ItemsProxySortingTests.cs

@@ -8,7 +8,7 @@ namespace Jellyfin.Plugin.Multilang.Tests;
 public sealed class ItemsProxySortingTests
 {
     [Fact]
-    public void GetSortArticlesUsesBuiltInLocaleFallback()
+    public void GetSortArticlesUsesBuiltInLanguageFallback()
     {
         var articles = ItemsProxySorting.GetSortArticles(new SortArticleCatalog(), [], "sv-FI");
 
@@ -27,7 +27,7 @@ public sealed class ItemsProxySortingTests
     }
 
     [Fact]
-    public void GetSortArticlesPrefersConfiguredExactLocale()
+    public void GetSortArticlesPrefersConfiguredExactLanguage()
     {
         var articles = ItemsProxySorting.GetSortArticles(
             new SortArticleCatalog(),
@@ -40,6 +40,32 @@ public sealed class ItemsProxySortingTests
         Assert.Equal(["exact"], articles);
     }
 
+    [Fact]
+    public void GetSortArticlesIncludesAlwaysIgnoredArticlesFromOtherLanguages()
+    {
+        var articles = ItemsProxySorting.GetSortArticles(
+            new SortArticleCatalog(),
+            [
+                new SortArticleEntry { Language = "en", Articles = "a, an, the", AlwaysApply = true },
+                new SortArticleEntry { Language = "it", Articles = "il, lo, la" }
+            ],
+            "it");
+
+        Assert.Equal(["a", "an", "the", "il", "lo", "la"], articles);
+    }
+
+    [Fact]
+    public void GetSortArticlesReturnsNoneWhenArticleIgnoringIsDisabled()
+    {
+        var articles = ItemsProxySorting.GetSortArticles(
+            new SortArticleCatalog(),
+            [new SortArticleEntry { Language = "en", Articles = "a, an, the", AlwaysApply = true }],
+            "en",
+            ignoreArticles: false);
+
+        Assert.Empty(articles);
+    }
+
     [Fact]
     public void ApplySortsByTitleAfterLeadingArticles()
     {
@@ -54,6 +80,41 @@ public sealed class ItemsProxySortingTests
         Assert.Equal(["Avatar", "A Beautiful Mind", "The Matrix"], ItemNames(root));
     }
 
+    [Fact]
+    public void ApplyUsesEachTitlesLanguageForArticleRemoval()
+    {
+        var root = ItemsRoot("La La Land", "La vita e bella", "Terminator", "The Matrix");
+        var articles = new Dictionary<string, string[]>(StringComparer.Ordinal)
+        {
+            ["La La Land"] = [],
+            ["La vita e bella"] = ["il", "lo", "la"],
+            ["Terminator"] = [],
+            ["The Matrix"] = ["a", "an", "the"]
+        };
+
+        ItemsProxySorting.Apply(
+            root,
+            new ItemsProxyControls("SortName", "Ascending", "", 0, 0, "en-US", ""),
+            CultureInfo.GetCultureInfo("en-US"),
+            item => articles[item["Name"]!.GetValue<string>()]);
+
+        Assert.Equal(["La La Land", "The Matrix", "Terminator", "La vita e bella"], ItemNames(root));
+    }
+
+    [Fact]
+    public void ApplyStripsApostropheArticles()
+    {
+        var root = ItemsRoot("L'avventura", "The Matrix");
+
+        ItemsProxySorting.Apply(
+            root,
+            new ItemsProxyControls("SortName", "Ascending", "", 0, 0, "en-US", ""),
+            CultureInfo.GetCultureInfo("en-US"),
+            item => item["Name"]!.GetValue<string>() == "L'avventura" ? ["l'"] : ["the"]);
+
+        Assert.Equal(["L'avventura", "The Matrix"], ItemNames(root));
+    }
+
     [Fact]
     public void ApplyPadsNumbersDuringTitleSort()
     {

tests/Jellyfin.Plugin.Multilang.Tests/ItemsProxyTransformerResolutionTests.cs

@@ -29,6 +29,7 @@ public sealed class ItemsProxyTransformerResolutionTests
 
         Assert.True(result.Change);
         Assert.Equal("Finnish overview", result.Value);
+        Assert.Equal("fi", result.Language);
     }
 
     [Fact]
@@ -37,11 +38,12 @@ public sealed class ItemsProxyTransformerResolutionTests
         var result = ItemsProxyTransformer.ResolveField(
             TitleField,
             [OriginalAction, LanguagePrefix + "en"],
-            Facts(originalTitle: "Original title"),
+            Facts(originalTitle: "Original title", originalLanguage: "en"),
             TextTranslations(("en", TitleField, "English title")));
 
         Assert.True(result.Change);
         Assert.Equal("Original title", result.Value);
+        Assert.Equal("en", result.Language);
     }
 
     [Fact]
@@ -55,6 +57,7 @@ public sealed class ItemsProxyTransformerResolutionTests
 
         Assert.False(result.Change);
         Assert.Null(result.Value);
+        Assert.Null(result.Language);
     }
 
     [Fact]
@@ -145,13 +148,13 @@ public sealed class ItemsProxyTransformerResolutionTests
         return result;
     }
 
-    private static FactsData Facts(string originalTitle = "")
+    private static FactsData Facts(string originalTitle = "", string originalLanguage = "")
         => new(
             "item",
             "tmdb",
             "movie",
             originalTitle,
-            "",
+            originalLanguage,
             "",
             "[]",
             "[]",