This article isn't looking at both sides. I am in an English speaking country and Google absolutely does honour my accept language header, eg is set to French I

This article isn't looking at both sides. I am in an English speaking country and Google absolutely does honour my accept language header, eg is set to French I get french. I suspect that a non English speaker with an English language configured device in a non English speaking country is sufficiently more common than the other way round that they choose to make an exception and ignore en accept-language headers