I think it's pretty strange to say "it learns"! A person is the one supposed to learn, he or she only!
Well an animal can learn too. For example, a dog could be learning to do a trick. That would be an 'it' that is learning.
Are both "he learns" and "it learns" correct, is that how these conjugations work? it can be assumed male or without gender?
The thing is "es" refers to a neuter noun, wich can be a human like "das Kind". But English "it" cannot refer to humans.
I think it should be "Ich lerne Deutch". The thing is that "lerne" may be both "learn" or "am learning".
Animals learn. Some of them are of undiscernable gender. Thus 'it' may be used.
How can a THING learn? I put down the only logical English meaning "It teaches" and the robot marked me wrong. A very peculiar sentence. On the other hand, maybe the "It" is a robot.