What is the most difficult language in the world?

That’s a tough ask, mate. There isn't one single answer. It really depends on what your first language is. For us English speakers, languages like Mandarin, Arabic, or Japanese are often considered the hardest. They have completely different writing systems and grammar structures. Plus, the sounds can be really tricky to master. So, the "most difficult" language is always going to be a personal thing. It’s all relative to what you already know.