Just to touch a little bit on that, I think it's two different fields. First you want to look at the trades as a competency-based evaluation. It really is important, the fact that when a roofer is on a roof, he knows what he needs to do to be there safely and perform his job.
Language is important, but people will learn to communicate with each other. It's incredible how, as you said, you can go to a site and you've got Ukrainian, Croatian, Serbian, Portuguese and Italian, and they're all working and functioning at a very high level. They don't speak each other's language but they speak the language that they need to. If it's framing or if it's cement finishing, they can speak that language. That's important.
With regard to learning second languages, I'm an example. I went to school at the age of five. I didn't speak a work of English—and I was born here—because my grandmother raised me and Portuguese was our first language. Children will assimilate and we will learn to speak. I might not speak as well as other people in the room here, but I can speak from experience. My father can function in Canada and he can't read or write English, but he can communicate. I think we have to be careful with that.