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I ask you to add support for Cyrillic characters to your program. At the moment these characters are not supported and I cannot put stop words on Cyrillic. Cyrillic characters are the Russian alphabet. Here are the letters: а, б, в, г, д, е, ё, ж, з, и, й, к, л, м, н, о, п, р, с, т, у, ф, х, ц, ч, ш, щ, ъ, ы, ь, э, ю, я.
Without these characters, I can't create a working filter in Russian language.
Also, in general, any non-ASCII characters. All major world alphabets (Chinese, Japanese, Korean, etc.).
Thanks.