Our system only supports standard ASCII (American Standard Code for Information Interchange) characters. 

"ASCII is a 7-bit character set containing 128 characters. It contains the numbers from 0-9, the upper and lower case English letters from A to Z, and some special characters. The character sets used in modern computers, in HTML, and on the Internet, are all based on ASCII." - w3schools

Most non-English languages use accents and non-standard characters that are outside of ASCII.

Anything outside of ASCII is not supported.