They do. Binary isn't used for general conversation, of course...but anyone who works with coding extensively will be familiar with binary. It is difficult for even me to fully understand, since it isn't....really a language like humans speak.

Zip knows binary because he's basically a computer program himself, in a way...

[And then a string of numbers appears, followed by a translation:]

010000100100100101001110010000010101001001011001001000000100001101001111010001000100010100100000010010010101001100001101000010100100010101000001010100110101100100100001

BINARY CODE IS
EASY!

[Chihiro smiles a little, shaking his head.]

It may be best if we stick to some simpler things, for the time being...