Is learning Chinese hard? If not, then what language is?

Yes

Explanation: chinese is hard because unlike the english language where we use 26 letterns in a specific combination to articulate a word and the tone of how we say words doesnt matter all that much while in chinese their are over 3,500 characters all meaning a word so for example they dont have A they have a letter that means apple and another one that means alligatior also the tone that you use when saying a word can change the word altogether for example ma which means mother, scold, hemp, or horse but which one your talking about changes with your tone