Grammar spell checker possible?

Hey guys,

I was brainstorming about some new business idea's the other night (always fun to do )
So I have this idea of making some sort of spell check website, where you can copy and past your text and it will be checked on words but also on grammar.
Now I'm Dutch and our grammar can become very complicated compared to other languages sometimes.
You think it is possible to make this work?

Yeah I think it's possible. But I don't think many people will use it. I mean word has the same features and even more.

Well for instance in Dutch sometimes words are written by a 'd' or a 't' at the end depending on grammar. Word cannot tell you what you should use...
It would be awesome if you could paste your thesis and check it on grammar or something. (ofcourse the site will make a backup and sell ur thesis somewhere else....)