The letter W is rarely found in French, and almost always in words borrowed from English or German.
It’s usually pronounced the same as the W the source language, meaning that in words borrowed from English, it’s pronounced like an English W (phonetic symbol: [w]), while in German words, it’s pronounced V (phonetic symbol: [v]).
|the letter w|
|wallon||Walloon (French-speaking Belgian)|
|wagon||train car, truckload|