Sorry about the bug in the mouse mini-game. Very specific bugs (in this case regional settings) can sometimes go unnoticed through the testing phase. But as always these will be fixed with the next update.
My system is definitely not a low-end-performance system. Clothing other applications or changing the quality to any other quality setting (such as very low) does nothing.
Changing UI language does nothing.
Running the application in English via Locale Remulator does nothing.
Not going to jump through any more hoops to resolve this issue the dev needs to resolve.
Suggestions:
Short term: Upload a save right after this minigame for everyone using the default name. Then, at least everyone who doesn't (need to) change his ingame name can play. No need to resolve the issue for people on an individual level.
Mid term: Fix the problem.
Long term: Instead of adding sequences that mock people for not correctly moving their mouse in a circle, add a scene that says "You need to succeed in this to proceed in the game, yet you haven't. *sigh* Okay, let's just pretend you succeeded for simplicity's sake", either directly or at least after failing any minigame three times (or something like that)
Alternative: Remove pointless minigames that add nothing to the game
