[jamesrcole]

I'm pretty sure "mutually unintelligible" is putting it too strongly. My partner is from Malaysia, but from KL not Terengganu, and we were in Terengganu visiting my relatives there earlier this year and I'm pretty sure she was able to understand the Malay spoken there fairly well.

[jamesrcole]

UPDATE (writing this in a separate comment because I can no longer edit my original one): I've had a chance now to ask her about it, and she said that she can't speak or understand the Terengganu Malay. When she was in Terengganu she could communicate fine in Malay with people, but that was because they were communicating in the "standard" Malay.