It didn't.
In fact I actually runned qTranslate and I could use it. Additionally, now it works as intended,that is tapping in the menu.
Hm,it doesn't remember languages I've chosen...Dunno if it's right or not though...

Will try another Qt app whether it works or not...
EDITED: trued qtirreco...worked from the start although before it's never worked.
Should I call it a success?!)

Well somehow this wierd problem can be called solved, Just tryed about 7 Qt-based apps and all work!