This question is taken from my google search log. Probably very few. Only Esperanto has ever been taught alongside other natural languages.
The other question in my logs was “How to make a conculture?”
Either read up on what the fiction authors are doing, in books about world building, or read up on what the anthropologists are doing. Anthropologists write real enthographic reports, fiction authors write entertaining stories. I suppose if you could combine the two, you’d either get academic fraud or yet another subcategory in the science fiction section of the book store.