To check available symbols for character ID in The Elder Scrolls Online.
It uses form of creating new character on the official website to check if @ID can be created and if yes, marks it as available. List of valid characters for @ID:
À Â Ä Æ Ç È É Ê Ë Î
Ï Ô Ö Ù Û Ü ß à â ä
æ ç è é ê ë î ï ô ö
ù û ü ÿ Œ œ Ÿ
P.S. For UTF-8 iterator was used code from https://github.com/Lucas-C/dotfiles_and_notes/blob/master/languages/python/utf8_iterator.py