[klingonopera]

I've often heard locals refer it to nothing more than "Bahasa", but yes, correctly you'd have to say "Bahasa Malaysia" or "Bahasa Indonesia", which can get umbrellad to "Bahasa Melayu", but that then sometimes offends the Indonesians, so I'm sticking to "Bahasa". My previous comment is valid for both.

Since we're nitpicking: People calling any Malay or Indonesian language "Bahasa" really bothers me, Bahasa means language, so if you tell people "I speak Bahasa", literally translated to "I speak language", it/that sounds really weird to me. (Personally, I find that beautiful. If nothing else is specified, it "defaults" to itself, how awesome is that?)