Hi otgooneo
I apologize for any inconvenience caused.
I'm not able to see the content of the link, in any case I'm afraid I wasn't able to reproduce the issue.
To test it, I put my Wordpress in Mongolian and it works:
In any case, there are more Cyrillic languages and maybe this is not which you are using. So please, could you tell me which you are using in order to test it?
Best Regards,
Andrea.