Earlier quoted context omitted.
Are those supermarkets really all that French or Belgian anymore? In practice, many large companies are owned by investors from all over the world looking for diversification.
The top management for sure is French/German/Belgian. At least big chunks of it. And the owners (individuals/companies) are French/German/Belgian. If push comes to shove, they will for sure prioritize French/German/Belgian interests. Can't really blame them but strategically it's not a position you want to be in, looking at it from the other side.
In more general sense, all global companies have some originating country and most of them keep the HQ and most of the high-paying jobs there. They expand to other countries mostly as a cost-saving measure and they have zero loyalty to them, while they have a lot of loyalty to the mothership.