Learning English from French!
I just noticed that this option has been added. Thanks, Duolingo!
Also, I have a question: I'm only halfway through the French course, so would it be advisable for me to do both simultaneously?
Also, this can be a great reward to be sure that you understand the language you learnt. Learning from the courses from the language itself (say French) skip a lot of things such as the english pronunciation or some english expressions. Even for someone whose English is the mother tongue there can still be things they weren't wary about or simply that they forgot.
I'm learning Portuguese mainly and after reaching the level 10, I tried to do the other way around, and guess what, it was harder than I thought!