I can't really find any information about that... ok, here's the thing. Basically I'm not sure how I should spell my name and any other personal information during registration. Because I need to use letters like that: ś, ó, ł . But I not sure is that accent marks? They said that I can't use accent marks such as the caret (ê), cedilla (Ç), tilde (ñ), grave accent (è), and umlaut (ö) so that means I can't use exactly those marks or any others like main. They also said I must to spell my personal information as appear on my ID, so should I type Śląsk or Slask? I'm little bit confuse. I will be glad for any your help guys, that's really important for me.