We are working on enabling more advanced filtering for both Arabic and Polish global chat. 
We are actively monitoring the system and making adjustments when needed. While the new filtering system is very advanced, it may not always work correctly e.g. on languages or words it does not recognize. 

Please report any issues on the Forum or by submitting a new Support request via the in-game Support button.

In order to investigate thoroughly, please accurately write out the word(s) in question that have been filtered incorrectly. Screenshots of the issues in question are incredibly useful. Please refer to this article on how to take a screenshot: How to Take a Screenshot.

For further information on what we consider appropriate or inappropriate behaviour in-game, please review our Chat Rules & Guidelines.