There’s no such language as C anyway, strictly speaking. There’s the C standard which defines a family of languages, then there’s the (C compiler version, OS, misc factors) tuples that define actual C-like languages.
According to the parent post, two families of languages. I disagree, though. Each standard _is_ a language. But which one does your compiler implement?
Exactly, it's "a language" but what you say will be interpreted differently depending on which specific version of which specific compiler you happen to be using today.