Conversance with mechanism drawing and designing tool and fixture, to be familiar with manufacture process, good communication skill, fluent English with writing and reading.
My parents are actually, they grew up speaking the Navajo language; they're fluent speakers. They're like a dictionary. If I ask them, “How do you say this? ” they translate.
But in fluent, everyday speech, when one word ends in a plosive sound and the next begins in another consonant sound, we don't always hear the release of the plosive sound.
It takes about two years of training for already fluent bilingual professionals to expand their vocabulary and master the skills necessary to become a conference interpreter.