An applicant can apply for an IDN gTLD in any script that is currently supported in the latest version of the Root Zone Label Generation Rules (RZ-LGR). The New gTLD Program: Next Round will use RZ-LGR version 6, which includes rules for 27 scripts or writing systems, namely: Arabic, Armenian, Bangla, Chinese (Han), Cyrillic, Devanagari, Ethiopic, Georgian, Greek, Gujarati, Gurmukhi, Hebrew, Japanese (Hiragana, Katakana, and Kanji [Han]), Kannada, Khmer, Korean (Hangul and Hanja [Han]), Lao, Latin, Malayalam, Myanmar, Oriya, Sinhala, Tamil, Telugu, Thaana, and Thai.
If a potential applicant wants to apply for a gTLD in a script that is not included in the RZ-LGR version 6, the applicant must work with the relevant script community to get it integrated into the RZ-LGR.
Need help getting started? Contact ICANN at globalsupport@icann.org. Learn more about the community process in developing the LGR procedure here. The applicant may be able to apply in the future, if the relevant script has been integrated and is available in the applicable version of RZ-LGR.