I do not have a passport no... And it's just a single character a "~" all the other characters are usen in english alphabeth.
That's why its so frustrating...
Viewing post in Tax interview, need help in NAME field
It doesn’t matter how many characters there are. If you have a european ID, it will display your name in both your native language and in english. This is the case at least with a few european countries that I know about. That is basically your official name when dealing with english contracts.
If you don’t have an ID, maybe you can check with a professional.