I don't think languages should be required, but people would ideally feel compelled to learn them to do work in their field. And I'd argue that even the analyticians could learn something from seeing how other languages "think." (As a side note, check out Kierkegaard's reflections on the Aorist mood in Greek in his unpublished novella Johannes Climasicus, if you ever come across it in a used bookstore or anything.)
For example, I think Greek is necessary to pick up on certain un-translatable things in ancient philosophy. E.g., in the Apology, Socrates is charged with "not believing the gods in whom the city believes." But that translation kind of sucks. The word for belief here, NOMIZO, is related to the word for law, NOMOS. Literally, something like "not lawing the gods who the city laws" — which perhaps has a connotation of Esteeming, or pushing it, OBEYING. And Even the translational gods make poor choices.
It's important to know this stuff. Should it be required? I don't think so. But hopefully we'd all learn two or three (assuming we don't work solely on English speaking philosophers).