To meet the requirement of multi-language and multi-cultural enterprise and personal websites, .Top Registry, approved by ICANN, added six additional IDNs (Internationalized Domain Names) besides current ASCII and Chinese language from January 2016. .top now supports Arabic, Chinese Simplified, Chinese Traditional, French, German, Japanese, Russian and Spanish.
How to register IDN domains
The same as registering other .top domains.
There is no limit with combinations between languages, numbers or hyphen.
Are there any reserved
Except for the few special words ICANN required to block, none of IDN characters is reserved, even single or double characters.
.Top Registry is in compliance with RFC, IETF and IDNA.
Variants of Arabic, French, German, Japanese, Russian and Spanish are not supported, but Chinese.