I think that companies tend to print country-specific labels anyway, don’t they? I know larger Mexican company products can often be found in two sections is some stores: in the “Juice” section, with an English label, and in the “Foreign” section, with a Spanish label. Same product, just different labels. I’ve seen American company products in Germany, and - again - large companies have country-specific packaging. Sometimes it’s pretty drastic differences; not just languages, but entire style and color schemes.

It’s usually EU products where I see them trying to cram, e.g., the ingredients list in 5 different languages on the same package. I don’t know why Frito-Lay wouldn’t just only print metric units on their French-labelled bag of Doritos. It wouldn’t have any impact on their domestic labeling.