OK, so I think that what is happening here is that
a) Purism is not specifying a language at all on that page, and
b) you have enabled automatic translation in Google Chrome (on by default?).
The recommended fix for the first one (@Kyle_Rankin) is as outlined here: https://stackoverflow.com/questions/2467454/why-does-chrome-incorrectly-determine-page-is-in-a-different-language-and-offer
however I would disagree on principle with the idea of putting in
<meta name="google" content="notranslate">
as some crappy proprietary Google metadata. (The other suggestions are reasonable.)
The recommended fix for the second one (@Sharon) is as outlined here: https://www.howtogeek.com/407924/how-to-turn-translation-on-or-off-in-chrome/
but better would be "Donāt use Google Chrome at all ! "
and if you do choose to use Google Chrome then first check that you have specified a reasonable default language (in your case presumably Canadian English or Canadian French or both), which is also covered by the config mentioned in the howtogeek article.