It's fine when you're solely reading something. Your eyes gaze to what you understand. Just like a product manual that comes in 20 languages.
Where this approach falls flat is web domains. It requires you to actually type out both the language you know; along with a language you (likely) don't. Quick Google only 1.2% know both.
And as pointed out above, then figure out if those variations are separated by a dot, underscore or hyphen. Notwithstanding the domains get ridiculously long.
It's good we try to please everyone, but sometimes the politeness goes too far. Registering the domains in both French and English in this case should have been more than sufficient.