Right now I only know vanilla Javascript. (I've used SQL for some very simple database calls, and I helped a friend with a C class they were taking, but my knowledge of both is extremely rudamentary and I would not consider myself to know those languages. If you're being extremely generous with your definition of "programming language", I've also built some relatively complicated programs in Scratch and Minecraft.)

Eventually I'm probably going to learn something new. Some plausible scenarios:

• I want to make a Minecraft mod, so I learn Java.

• I want to contribute to Manifold, so I learn Typescript.

• I want to improve the performance of my webapps, so I learn Rust to use with WebAssembly.

• I want a language for small projects that is less stupid than Node, so I learn Python.

• I want to finally make one of the video games I've been thinking about making, so I learn whatever language seems best for that.

Any programming language or large framework can count for this market. If it's questionable whether something like React or Typescript should count, I'll resolve this subjectively based on whether it felt more like "learning a new thing" vs. "improving my knowledge of an existing thing". If I'm able to read a 5 minute explainer and immediately embark on a complicated project, it's probably not a new thing. If I have to spend hours setting up an environment to get it to work, it probably is a new thing. If I have to ask someone for help understanding the thing, it probably is a new thing.