[Jon Stratis]

I think that it's important for the learning process to tackle one language at a time. There's less confusion that way, and it's always easier (and quicker) to learn the second language than the first.

As for using both languages during the build season... you can only load one onto the robot at a time. Given the high amount of stress and low amount of time to debug during the season, I don't recommend trying to switch back and forth between languages - pick one, stick with it, and make that particular code as good as you possibly can. To learn the second language, have them rewrite the code in the second language during the off season. That will give them time to learn it, a good project to use, and it will help highlight the differences for your team.