I forgot to say that another option was to contact them by mail, so at least they're dogfooding ;-)
Here in Hong Kong English supercedes if presents and next door in Shenzhen it's the opposite.
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.
Any logical personal will understand showing content in multiple languages (as text output); but when it comes to user text input (domains, web search etc), it's absurd to believe the same rules should apply for the user.