A bit of bilingual Googling shows that the French actually use the word Surimi most of the time which makes it easier
The term for surimi sticks is - battonets de surimi
add to that crab flavour - saveur crabe
They are sold as batonnets de surimi saveur crabe
This is a recipe for the gratin
https://www.cuisineaz.co...tin-au-surimi-79746.aspx
They mix chopped onion with chopped surimi, put in a dish and cover with eggs and crème fraiche beaten together with seasoning, sprinkle with grated Gruyère cheese and bake for 20minutes. Not convinced that would cook the onion to my taste
I have used them in quiches, which isn't that different to the gratin, usually with sweet corn, but mainly I add them to instant ramen