The main thing that matters is your account. Only Japanese accounts can use Japanese kanji or Korean accounts use Korean for guild tags (unless it was changed very recently but i don't think so.) That's why you see people selling asian tag creation services. It's not every character you can use, and weirder, even some characters that you can type in chat are restricted in guild tags. (Anyone can type any supported character in chat)
Yes, i already knew that, i'm only asking if someone knew a list of all the specific symbol that could be used, not the regular characters you can easily find from their own keyboard language