[fhd2]

You would. And if the juniors don't really _write_ code in the languages you use, if they don't make mistakes and do research themselves, it'll take them a lot longer to learn them sufficiently to be able to do those reviews.

Listening to people talk in Japanese, I picked up enough to have some idea what they're talking about. I can't speak the language beyond some canned phrases. I certainly wouldn't claim to know Japanese. And I definitely wouldn't get a job writing books in Japanese, armed with Google Translate.

For programming, my solution to this right now is lots of pair programming. Really gives you a good idea of where somebody is at, what they still need to learn, and lots of teaching opportunities. I just hired a junior and we spend about 8 hours a week pairing.