Yes, Bahasa can be learned very, very quickly, it uses the Latin alphabet, words are written how they are spoken and vice-versa, verbs are never conjugated nor do they have tenses and the grammar is simple (e.g. plurals are created by simply doubling the words, like rumah, house, becomes rumah-rumah, houses, which in written form is abbreviated to rumah²).

My father used to joke you can learn Bahasa in three weeks, English in three months, and German in three years.

I've no clue about the Terengganu dialect, though.

It's my third language, and I've never needed it professionally, so I whatever I've said may not be 100% accurate...

Source: Am half Malay, lived there for nine years, around the KL area.