You can have problems if:
- you have set up improper encoding for your forums. I suppose if you have done all instructions for UTF-8 correctly AND translated your language pack in UTF-8 AND set up the proper META tag in language pack, THEN you can not have such problems. Even on a default miniBB encoding, which is iso-8859-1, your characters should work. I've tried to create a forum with the same title like you do, and it went absolutely smoothly in iso-8859-1.
- your database is configured improperly. If this is your local installation, supposing your level of knowledge from your replies, I don't wonder it is set up improperly.
Besides of that, it's all in your hands. If it doesn't work, choose another software, obviously your karma isn't compatible with miniBB.