Fonts language support

Hello everybody, I have a question and I can't find an answer in the internet.

I'm in a process of designing a typeface - TT Nord. It's not the final design by that link. Anyway, what bothers me is that I've drawn many glyphs, including Cyrillic extended and Latin extended a and b and others. Is there any way to know what languages does my font support? Maybe a script or some kind of a web service?

Thanks in advance?