cafeine_: Yeah, language settings are not saved so you have to change the language every time you boot the game. Maybe it's one of those settings you have to change in the main menu (before loading a game) and can't change once you're in the game proper? I'd try that before reinstalling.
Edit: Strange, I tried changing languages ingame (after loading a save) and it seems to work. If you can't change languages at all it's a bug and maybe inxile would like to know. Can I point them to this thread?
Also, please don't let this game put you off kickstarter, this is actually one of the worst examples of videogame kickstarters I've backed (and I've backed a few). Some have issues on launch and/or are late, but in my experience it's not that different from regular game launches, especially RPGs which are complex beasts and hard to test. properly (when they're tested, which I don't think inxile did outside of the backer beta).
I had a similar issue with the mage tower, the door outside the stone head simply didn't have the center 2 gears. They were entirely missing. Couldn't figure out why I couldn't solve the puzzle until I looked at a pic online and realized gears were missing entirely. I loaded an earlier save and they were there. So... that's a tad frustrating, not knowing if you simply can't solve a puzzle because it's bugging on you.