Your diacritic marks are incorrect?
The issue is probably due to texture mod, eventually language pack.
Check this out:
And seek for non-multi5 patch.
About the UI issue, make sure that it exist on vanilla version of the game (fresh game installation+better Rayman).
If it only happens with texture mod, write about it in relevant texture mod thread and describe what is your game resolution and native resolution.
Try to also exclude whether the issue is connected with Polish version (check the English).