@nova This! Any language we can use to tell the computer to do stuff it’s a programming language. If you can write bugs, it’s a programming language.
Claiming a computer language is not a PL is either gatekeeping or wrongly mixing the concepts of PLs and General-Purpose Languages. DSLs are PLs too! Of course you might not be able to write Conway’s life with a DSL, that’s what “specific” means. DSLs are designed to tell the computer to do specific stuff. Markup languages are DSLs and thus, PLs.