The World Stamp Identifier on Stamp Smarter (
http://www.stampsmarter.com/WorldID_landing.html) is the only online identifier which supports entering foreign language characters to search for stamps. Currently it has entries for English, Cyrillic, and Asian stamps; hopefully I'll get around to adding Arabic characters in the near future. It has over 4200 total entries (stamps) and over 3200 stamp images. The 'Universal Search' section has a pop-up foreign language keyboard; so for example you can enter this character

it will return examples of stamps from China. (Sorry, had to use an image because I can't figure out how to make the forum editor use foreign language characters.)
This tool started with the list from the Society of Worldwide Stamp Collectors website and was coordinated with the help of by APS. It may eventually become a common component of all three web sites if I can work out the details of getting the source code and SQL database onto their web sites.
Don
APS #094826