Of course it makes the Brute Force attack harder. When doing a Brute Force you simply try all combinations out of a limited pool of chars. Which will most likely not contain arabic, chinese, japanese, cyrillic chars. It is unlikely that someone that wants to attack your password is choosing a pool with these chars because with increasing pool size the time to get the password is increasing exponentially.
You can calculate the amounth of combinations like this -
Charpool = 52 (lowercase + uppercase alphabet)
Combinations = 52^Length
Which will resolve in 380204032 combinations for a 5 letter password.
But to answear your question - yes it will make brute forcing more complicate. Not only because the increased charpool but even more with the fact that the attacker has to include these exotic chars in his attack.