Change languages on the fly?

[Kanti]

As far as I know, you'll need to return to the launcher and change language settings there. I think only the cutscene language can be changed on the fly. Not 100% sure though; haven't tried for a while.

This would be correct. To change in-game text, you need to change the launcher language to your language of choice. Changing cutscene dialogue language is an in-game option.