Registration Form – help

hello everybody..

i am creating a registration form

and have fields :

name:
surname:
username:
password:

as if for english its clear..
but in a first 2 field called (name, surname) input text must not be english but in georgian. so how can i check if user has entered letters in GEORGIAN LANGUAGE .. no other language is accepted..

if it is english i know its posible to use REGULAR EXTENSION like this [A-Z-0-9-a-z] but how can i check when georgian language?

thanks

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