Although nice in theory bad in practice imho. mIRC is small and fast. wouldnt want it to waiste time checking spelling, also mIRC is used by hundres of races that speak hundreds of languages. That would suck having a dictionary for each language or a different download for each.
That's true, but wouldn't i take ages to be implemented. With all the different languages an all. I could be wrong, I mean it's a nice idea but if you have spelling troubles, you could always use slang.