I had a company which had a number of English as a 2nd language personnel. We brought in an English tutor once or twice a week (I don't remember.) It was highly beneficial for them and for us English speakers. Everyone was more comfortable exchanging ideas, etc.

Whether this could translate into a language lab with screen and cameras internet-linked into a native speaker who isn't trained in language tutoring...sounds like a stretch. But if there is a way to get someone trained up quickly into a program...perhaps you are onto something.

Never underestimate their intelligence, always underestimate their knowledge.

Frank Delaney ~ Ireland