Which language to choose?

Thank you so much for all the great feedback. My son’s reason is just ‘not wanting’ to do Mandarin anymore… and I agree…being non-Chinese parent, I can’t help him with the language and it is sure very complex to learn (I have witnessed him working on all possible combinations of strokes, however he did very well and maintained A) and don’t want to force him into something complex with other advance level subjects he is planning to take. I am kind of leaning to Spanish (because of it’s usability in professional world)… but he wants to take Latin saying it will help with English and if decides to go to medical field later… choices are French, Spanish, Mandarin and Latin only.