The hardest languages to learn are the ones that have a different paradigm than the ones you're used to.
Most modern languages today somehow derive from C, in a way or another. JavaScript, Go, PHP, Java, C#, even Python... If you're used to one of these languages, you should be able to get a high level understanding of code written in other languages. Some like Rust can be a bit harder when diving into idiosyncrasies (e.g. borrow checker and lifetimes), but it's not too hard.
But if I encounter a Lisp, or a more domain-specific language like Julia or Matlab, I need to put in a lot more effort to understand what I'm trying to read. Though Lisps are inherently simple languages, the lack of familiarity with the syntax throws me off.
That sounds like "guys we're totally not going to announce the Switch 2 soon, don't worry, we still support the OG Switch so you can still buy consoles and games for Christmas, k? Don't need to wait for the next console, that totally doesn't exist."