If 343 would let us im sure the fans could do it.
"Esperate, quien eres tu?"
"Llámame Subteniente."
That's right! Everything gets translated.
Not like the game which leaves a bunch of nouns in English.
Edit- i guess Maestre Jefe would be a better translatrion of the words (Master Chief) but there is no such rank in the Spanish-speaking Navies i searched. I found Suboficial Jefe from Colombia and Maestre de Tercera from Venezuela, which sounds more like Chief Petty Officer Third Class, as some equivelants.