In order that the sequence listing is compliant with WIPO ST.26, the filename should be provided using Latin characters only. There are only four elements within an ST.26-compliant sequence listing which allow non-Latin characters (see paragraph 40(a)):
If your project name is provided using non Latin characters, please provide a filename using Latin characters. If you do not and the sequence listing is then validated, the following error will be returned:
"The element includes non-permitted characters: <filename>. Only printable characters (including the space character) from the Unicode Basic Latin code table (except the reserved characters) are permitted."