chesaro: Hello everyone, i'm having this exact issue since i upgraded to windows 11, and i found a... well it is not a good fix in any way, but at least you can see the texts.
Go to the installation folder and open the file with a text editor:
LangDef.tsc
And change the line
SetLanguage AUTO
to
SetLanguage ENGLISH
I have no idea why, but if you put other language (tried FRENCH) it stays in a bad state, and with ENGLISH it goes to Spanish (at least for me, not sure if it uses the default language of windows), but at least you can now navigate the menus.
Hope it helps someone, and if someone finds a better solution, please reply
Update: Just double checked, it goes to english, it is just the initial messages that use the systems language.
Dude, it worked. Thank you a lot.