With Google Translate (and possibly other translators) becoming both ubiquitous and very good at their purpose, it seems that the problem of getting your message across to a person without knowing their language is to a very large extent solved. In the past, you simply couldn't communicate with a person who doesn't know your language without knowing theirs (or hiring a human translator). It also used to be the case that machine translators were laughingly bad at their job.
But now that that's changed, why would one want to learn a foreign language?