Multi Languages Spell Checker

This program I have develop for me and it allows to spelling text in difficulties as possible environment, such as my site http://www.vb-net.com/

Usually I write my articles in three or four languages (Ukrainian, English, Russian, Bulgarian) with a lot of program code.
My site contains about 600 entry page (Articles and summary (with secondary page) it contains more than 10,000 pages. And I want quickly change page, saving it locally and uploading it to web server.

Spell checking is slow operation and main part of my checker have to working asynchronously.