Earlier quoted context omitted.
Is an array language a language where you only have arrays? That honestly sounds a bit odd.
You could consider Pandas / numpy an array language, even though it's really a library for Python. The exposed API is IMHO what's important.
I agree, but you have to take extensibility into account. You either have an extensible language and extend it[0], you make it an array language to the core, or you just have a few slightly convenient functions (not a language). (I don't have enough experience to judge which category Pandas / numpy are in)