You’ve got to be multilingual if you are royal!
Out of nearly a dozen rules applied to the members of the royal family, one of them is learning at least one additional language. Lately, it was revealed that Prince George could count in Spanish at a very young age which shocked and impressed the people., which was not only an expression of an intelligent child with quality private education, but it was among the royal family’s rules to be multilingual.
Queen Elizabeth herself speaks French while prince Williams speaks welsh along with French, and Prince Charles is very good at German. It’s evident that the royal family members have to attend numerous events and gatherings, and it ultimately makes sense for them to learn various languages and communicate with people efficiently. This rule is more of efficiency rather than a restriction.