[susan53]

Quote Supperman

I tried to make such an unlikely-in-my-daily-life context;
C3PO (of STAR WARS) is a human-shaped translation-droid, which can speak thousands of languages fluently. Its program has been installed thousands of vocabularies throughout the galaxy.

I hope my understanding is corrected toward the right track this time.

I still don't like it, because you are talking about real languages rather than computer languages. As I said "vocabularies" in a technical context doesn't mean "lists of words" but lists of commands. So for example, some items from html vocabulary are <br>, <i> and <center> - not words necessarily but code. Have a look here for more examples.

So again, in this context I'd use languages.