The funny thing is that once I considered learning Chinese because, at the time, I was in the middle of a hardware project where we had to deal with motherboard and other component suppliers located in China and our communications were constantly breaking down because we couldn't agree on a common subset of English.

So, if you really have to spend time with people who don't speak your first (or second, or third) language, it's always a good idea to invest some time learning their first one.

And it also shows you care.