Practically everyone here speaks French! Lots of people also speak some English, though most aren't fluent. German, Spanish and Arabic are also common second languages in France.
France is part of the European Union, so we use the euro here. Lots of other countries in Europe also use the euro! The symbol for the euro is €.
It depends where you buy your water, but I've seen prices anywhere between 1€ and 1.5€.
I made French toast with a leftover baguette this weekend, and it came out tasting delicious! French toast was invented in France (which makes sense!) in order to use up leftover bread. In French we call it pain perdu, which means "lost bread", because you can make French toast with bread that otherwise would go to waste!
A lot of artists from the U.S. are also well-known in France. Some of my favorite artists from home, such as SZA, Kendrick Lamar, Harry Styles and Noah Kahan are also popular here! One of my favorite French-speaking artists is Stromae. HJe's from Belgium, where people also speak French, and he is one of the most famous artists in France!