So which should I choose?

Which language to choose for coding.

Out of all of the recommended languages in Languages, I fully recommend using JavaScript. The only reason I recommend this is because it is used everywhere for Discord bots.

Discord.js has tons of support everywhere, and full websites explaining in-depth on how to properly use Discord.js

And compared to some others, Discord.js is quite fast. With advanced Node.js async, it can run multithreaded applications, rather than most languages where everything is done in a "single flow".