I've been complaining about this for a long time now.

I wrote a small greasemonkey script to add hl=en to all except a select few google locations. They are the most egregious. Unfortunately for us the industry has chosen to go with IP address determines language and it's getting more and more common.

I DO have accept language configured in my browser and I also DO understand that statistically many people's browsers are mis-configured. NO. I'm not leaving my browsers logged in to every site in the internet.

We'll forever be tilting at windmills.