It seems that there were reports from CS and ES about some weird language issues...
Downloading language packs from SMF and overwriting existing files seems to have resolved, so I will do the same for our other languages.
This will take me some time, and if I get sleepy, may be pushed to tomorrow, but I will get this updated soon.
My apologies for any errors, and I will post again here when I have completed the language package extractions. (It's multiple pages to download each, then extract each, then upload each; not hard, but it takes a few minutes per language)
EDIT: Duh, figured out a faster way to streamline the process. It's done! :)
EDIT2: Everyone may need to visit the following link and choose their preferred language: forum.simutrans.com/index.php?action=profile;area=account
(Mine was set to Albanian, though the forum showed in English. Weirdness!)
Language Board mods, you may need to post this tip somewhere...