Every player's permanent local area setting (and also global chat language) is based on where they were when first creating their village.
You can check your in-game "local rankings" to see if your settings are correct. If not, it's possibly because you created your village while abroad. In some cases
, certain countries or language groups share the same servers. This is why you may see a different language from yours on the chat, even if your local area settings are correct.