Valakian language
The Valakian language is spoken by the Valakians, a pre-warp civilizations that share their planet with the lesser-evolved Menk.

When  rescued a Valakian shuttle, the universal translator required a few phrases before it was able to translate. ()

Examples of spoken language 
Trenakadula ta? Morana dunnat?
(The Valakian astronaut says this upon waking up confused in sickbay.)

Kandala va gonsh. Yorata vala?
(The Valakian responds to Captain Archer, while Archer's words are not being translated.)

Languages