Exclude "local source" for language detection for sources language filter

The local source is always shown, and therefore its language ("other") should only be shown in the language filter in case an actual source is installed that supports is of "other" language.

src/features/browse/sources/Sources.tsx

@@ -56,6 +56,14 @@ export function Sources({ tabsMenuHeight }: { tabsMenuHeight: number }) {
             }),
         [sources, shownLangs],
     );
+    const sourcesForLanguageFilter = useMemo(
+        () =>
+            SourceService.filter(sources ?? [], {
+                showNsfw,
+                keepLocalSource: false,
+            }),
+        [sources],
+    );
     const sourcesByLanguage = useMemo(() => {
         const lastUsedSource = SourceService.getLastUsedSource(lastUsedSourceId, filteredSources);
         const groupedByLanguageTuple = Object.entries(
@@ -72,7 +80,10 @@ export function Sources({ tabsMenuHeight }: { tabsMenuHeight: number }) {
         return groupedByLanguageTuple;
     }, [filteredSources]);
 
-    const sourceLanguages = useMemo(() => SourceService.getLanguages(sources ?? []), [sources]);
+    const sourceLanguages = useMemo(
+        () => SourceService.getLanguages(sourcesForLanguageFilter, { excludeLocalSource: true }),
+        [sources],
+    );
     const areSourcesFromDifferentRepos = useMemo(
         () => SourceService.areFromMultipleRepos(filteredSources),
         [filteredSources],
@@ -108,10 +119,10 @@ export function Sources({ tabsMenuHeight }: { tabsMenuHeight: number }) {
                 selectedLanguages={shownLangs}
                 setSelectedLanguages={setShownLangs}
                 languages={sourceLanguages}
-                sources={sources ?? []}
+                sources={sourcesForLanguageFilter}
             />
         </>,
-        [t, shownLangs, sourceLanguages, sources],
+        [t, shownLangs, sourceLanguages, sourcesForLanguageFilter],
     );
 
     if (isLoading) return <LoadingPlaceholder />;