What are the most useful languages to learn? :.. For languages that many people speak or are spoken in a large area you've got languages like spanish, arabic, french, mandarin, portuguese, hindustani, swahili etc. Some languages are.

What are the most useful languages to learn? :.
What are the most useful languages to learn? :. from i.imgur.com

So as you can see on all fronts it comes out pretty clear which languages are the most useful. I’ve listed them down here below, along with how much time an English speaker approximately.