There are only a few that matter Php C# Javascript. All you need to know. All the rest are unnecessary like python or garbage held in use because of nostalgia like c++ or rich failed attempts at a language like Java or f . But worse than languages are the fucking fuck off and die frameworks. Fuck I hate frameworks and similar. Coders just need generic libraries that they can adapt to any solution. Instead dipshit big tech have a hundred frameworks and companies use a couple of them and require that programmers be proficient in thousands of combinations of languages and frameworks. But if they actually are then they must be expert in nothing as no one has the time. E. G Don't learn sass and less. Just fuking learn css.