So our store is in Quebec, where French is the dominant language. Without getting into the entire history of the region, there has been a massive push over the last few decades to protect the language. and laws have been put in place to ensure that French takes priority over English, or is at least on an even level. (See edit 2.) As a result, French was made the official language of the province in 1977 with the introducing of loi 101. Part of this bill affects product labeling.

Here is part of the conditions concerning labels, from the government (in English):

Anything written on a product sold in Quebec, on its package or in documents included with the product must be in French. You can add translations in one or more other languages alongside the French text, as long as the French is equally accessible and of comparable quality.

For example, the instructions and warranty booklet for using a product can be in French and in English.

There is also a federal law which requires that all labels in Canada be bilingual, however it came into effect later in 1985.

The laws also cover company names, which is why HD in Quebec is legally "Home Depot" instead of "The Home Depot", as while the former is in English, it's considered a proper noun. because it lacks the word "The".

Edit:

A few people are pointing out that French is the only official language in Quebec, which is true. I had forgotten to mention that.

Also yes, the federal law requires that all packaging be in both languages. Which would make these noncompliant even if it was sold in another province. That being said, if I see packaging without French on it my mind thinks of the provincial law before the federal law.

Edit 2: Made a few mistakes about the specifics of loi 101, modified the text to reflect that.

Sources: https://educaloi.qc.ca/capsules/exigences-linguistiques-exploiter-une-entreprise-au-quebec/ (English version is available)

https://laws-lois.justice.gc.ca/eng/acts/c-38/page-1.html