They should about the rules of trip and they should maintain pace and healthy environment.
Learning a new language is always great as it can help with a lot of stuff, communications, traveling, understanding its culture, traditions...etc learning french will be a huge credit if you learn it and put it to ur vocabulary as in europe its the third language and when ur traveling to europe its great to know some french for if you stumble upon a problem or needs help with something so that u know what to direct say.