The only measurement i have is anecdotal, french customers used to email our support to complain about a lack of french-language support (we have always had fre

The only measurement i have is anecdotal, french customers used to email our support to complain about a lack of french-language support (we have always had french support, but they didn't like having to find a button when we detected the language wrong). Since switching to accept-language i'm not aware of any complaints.