What is a 3 letter southeastern Asian language called?

There isn't a 3-letter language spoken in Southeast Asia. Languages often have more complex writing systems or use Latin alphabets with diacritics.

Could you be thinking of something else? Maybe:

* A 3-letter abbreviation for a language: Like "Eng" for English, "Chi" for Chinese, or "Jap" for Japanese.

* A language family: Like "TAI" for the Tai-Kadai family or "MND" for Mon-Khmer.

* A specific word: Some words in Southeast Asian languages might be 3 letters long.

If you can give me more context, I might be able to help you find the language you're looking for!