What @vkc said:

#HTML is a #ProgrammingLanguage. Just because it's a #Markup & directly #interpreted languague doesn't make it less valid!

• Otherwise #BASIC and all the #Shells (like #bash & #fish) ain't programming languagues eiter.

I'd go so far as to say that #Markdown and #BBcode also qualify as sub- and supersets of #HTML just like #Sass for #JavaScript.

• For a #Programming #Languague it's irrelevant if they need a compiler and/or interpreter as the reason to use them is to have a #HumanReadable & -editable codebase and not some #Apple1-Style "shoving binary data to a certain adress and hit run" kinda situation.

Even #COBOL on #PunchCards is #ProgrammingCode!