The composer says which language a post is in

A post went out in the reader's own interface language whatever it was
written in. The composer now has a language picker (each language named in
itself), starting at the persona's default from Settings, else the
interface's; a reply starts in its thread's language. The e2e poll test
picks Italian and finds it on PrivaPub.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

Services/StatusService.cs

@@ -54,7 +54,7 @@ namespace decePubClient.Services
 				Sensitive = form.HasContentWarning,
 				SpoilerText = form.HasContentWarning ? form.SpoilerText : null,
 				Visibility = form.Visibility,
-				Language = CultureInfo.CurrentUICulture.TwoLetterISOLanguageName,
+				Language = form.Language ?? CultureInfo.CurrentUICulture.TwoLetterISOLanguageName,
 				ScheduledAt = form.ScheduledAtUtc?.ToString("o", CultureInfo.InvariantCulture),
 				Poll = form.HasPoll ? new PollForm { Options = [.. form.PollOptions.Select(o => o.Trim()).Where(o => o.Length > 0)], ExpiresIn = form.PollExpiresIn, Multiple = form.PollMultiple } : null,
 				QuotedStatusId = form.QuotedStatusId