The other thing of course about MML is that, as with most language degrees, it’s a four year course with a year out in another country. This often puts students off, especially state students, because they often dislike the idea of coming back to do their final year when their friends in other subjects have graduated. It used to be that sandwich degrees were sought after, but today’s students, especially in the state sector (and especially post-Brexit), are nervous both about doing this in itself, and about the extra year out of the job market. It’s also, of course, an extra daunting prospect for students who have not travelled much.
I think it’s difficult for those of us who were at school more than a couple of decades ago to appreciate how insular British culture has become in the last fifteen years or so. It was normal to do two languages when I was at school, even in a bog standard comp. Europe was the future. The Channel Tunnel had opened! Low cost airlines had arrived! We were all going to be living and working anywhere we liked in the EU in all these exciting cosmopolitan places! Languages were a normal part of school life. You had to take at least one to GCSE, and most people did two.
This is still the norm in the independent sector, but not remotely in the state sector any more, unless you’re at a good grammar or outstanding comprehensive/academy. Bring interested in other European cultures and languages is simply not even thought of as useful or essential any more - you hear the “why learn them when everybody speaks English” argument all the time. It really is just that anti-intellectual.
This is not at all the same in the independent sector, because often private schools are very international, it’s not unusual for there to be lots of bilingual kids, and 2+ languages is normally expected. The kids are often taken on language learning and educational trips abroad quite early, and often have many more opportunities to experience holidays and living abroad, so the idea of travelling or living in another country is not nearly as daunting as for, eg., a kid in a comprehensive who quite enjoys Spanish, but has never had the opportunity to travel or experience life outside a British culture which is very parochial and insular these days.