Programming languages
I believe myself that I'm fairly competent in HTML and CSS.
PHP: is something that I learn when I need to use it. This then means that I'm not good at functions and OOP (Object-Oriented PHP).
Some might say I know the minimum. I just say I can work with it on a daily basis and search for the issues I find.
Javascript: I refuse to use this language for more than absolutely nessesary. The only reason why I wanted to use it on this site was to get the blinking cursor at the top. Otherwise I hate langauges that a user can inject into. Anything clientside should be removed.
99% of all the errors that I get on websites are due to Javascript.
There might be an update or something, or even a browser might not support it.
Lua: The only reason I learned how this language worked was because of Minecraft computers. Whatever that mod was called in around 2010-2011. Where you could program computers using Lua.
I know it's still around and it's possible to use, I just dont use it anymore.
Java: Java is alot different than Javascript. Java is sadly dead, but it was fun while it lasted. I used Java to make mods for Minecraft. That was the only reason for me to learn it.
CSS: Not a language, or what people say, but you know what. I think of it as a language. It's something that not everyone know.
There so many people that makes websites that have no idea how CSS works and how to write it.