disable cyrillic nickname

Hi. Need disable a cyrillic jid on jabber-server.
Current version: ejabberd 2.1.9
# uname -a
Linux hidden.im 3.2.0-4-amd64 #1 SMP Debian 3.2.54-2 x86_64 GNU/Linux

Have users as:
1. abcdf@hidden.im
2. аbcdf@hidden.im

here user2 have "a" cyrillic. Need make rule for disable it.
Help please and thanks.

Try using ACL with regex that

Try using ACL with regex that explicitly allows only latin chars, or disables cyrillic

Show please, if can, how it

Show please, if can, how it make. Or how i can disable one or all cyrillic symbols.
Thanks

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