Don’t other options already exist, though? Chinese, Japanese, some Arabic, some German, Russian, Italian.
This comment reminds me that my kids’ Spanish classes were often among their largest, usually right at the school’s maximum class size (speaks to demand) where some other classes could be just 8 or 9 kids. I don’t see a school telling kids/families “no” on their language instruction choices. I’m confident that the schools are factoring what works and what families want into their curriculum decisions.
In what is certainly a long laundry list of wants, more language selection is probably not in the top 10 list.