Joe Offer, please tell us whether you tried nwc2abc, and what problems arose, if any. Or have we misunderstood your wishes - writing ABC without having to learn it?

Displaying and playing ABC code is the user's part. There are many tools around for many tastes. Those of us who do not need publishable sheet music will hardly worry about too many slurs at grace notes, although I think this should be regulated in the standard document. (Who is in charge of that at the moment, de facto? Jef Moine?)

ABC notation is not the easiest such language, but the one for which most tools exist, and reasonably easy in most cases. If you want to learn it, I'm sure you'll manage.