I dreamed that my dead mother was driving.

You can also Baidu it. There may be an explanation similar to that of Duke Zhou, so you can refer to it. Besides, if your mother didn't speak French when she died, I suggest you go to the temple and ask them to help your mother do it. It's good. Burn more tin foil paper on the Qingming winter solstice and prepare more food and clothes for her. Generally speaking, during the period from Qingming to Japan, a ceremony of crossing the river will be held in the temple. You can also sign up for your mother.