Trust us, we took BlaBlaCar multiple times in France and met some really friendly people while barely speaking any French! There was always someone in the car, whether it was the driver or another passenger, who knew English. It's a pretty safe bet.
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BlaBlaCar Bus Luggage PolicyHold luggage: 1 free piece of luggage of up to 23kg and 200cm and 2 paid additional luggage is allowed in the hold per passenger. Special luggage: Bicycles, winter/summer sports equipment, and musical instruments are allowed as one piece of luggage hold or hand luggage, depending on size.