French is the main language spoken throughout France. However, walking through the city of Lyon, some stores, restaruants and signs have English translations too. Just yesterday I saw a sign for "le chocolat chaud" (hot chocolate) with the English right beneath it.
The money is called the Euro, which is the currency used throughout most of Europe. Similarly to U.S. dollars, it comes in either coins and paper bills. 1 Euro is worth about 1.1 U.S. dollars, so even though the Euro is worth a bit more, the value is approximately equal. You can exchange dollars for euros (or vice versa) for a specified rate at any bank or money exchange station.
A bottle of water typically costs around .75 Euros (about 1 US dollar), which is a bit cheaper than the water bottles you can buy off a street vendor in New York. There are no stands in the street to buy water, but you can easily find them at any grocery store or eating establishment.
