That's debatable. I think most people that work with TS see it as a syntax extension for JS. Do you think JSX is a programming language?

For anyone who uses TypeScript on a daily basis it's not ambiguous at all. Everyone who works with TS knows the runtime code is JavaScript code that is generated by the TypeScript compiler. And it's also pretty common knowledge that JavaScript is quite fast, but TS itself is not.

And if this post was about a TS compiler that emitted x86 executables you would be wrong and find out that it is indeed ambiguous.

Why would a hypothetical "tsx86" project write an article titled "10x faster typescript" instead of "10x faster binaries with tsx86 2.0"

If you have to invent things for something to be considered ambiguous, is it really ambiguous?