Yes, except in specific institutions not accepting scholarship PhD students. What matter is that the amount of your scholarship should be enough for you to live and work in proper conditions. You also must be insured for medical expenses and risks in relation with civil liability (if you break something) and workplace accident. Each doctoral school sets a minimum amount for financing the PhD student should have to be able to register; this amount is generally about 1,000 to 1,400€/month. If your scholarship is inferior, then your host laboratory should pay a supplement (i. e. if your scholarship totals 900€ and the amount requested by your doctoral school is 1,200€, your host lab must pay you a contribution of 300€).