I speak AmE, but I have encountered the term school-leaver or school leaver in BrE and AuE writings.
Collins Dictionary defines school leaver:
School leavers are young people who have just left school, because they have completed their time there.
Cambridge Dictionary defines school-leaver:
a young person who is about to leave or has just left ...
Marcel disagrees with the initial premise as do I. For my generation the teaching of French in a British school was standard as the first foreign language. This was, I believe, not the case in an American school. Thus for the British the pronunciation of French words (and phrases) was as close to the correct French as the talent of the speaker would allow.