It started a few weeks ago, Hulu would give me a Spanish ad every now and then on our Roku. A week ago, it had become all ads on Hulu across all profiles and devices.
Now it's spreading like a virus, AdSense content on devices where I'm logged into the same account as the phone I control the Roku with are about half Spanish. My wife has started seeing them occasionally on YouTube but not as often as me.
Gone through every setting I can find and can't find anything relevant. Hell, the Roku itself doesn't even have my or my wife's Google account on it, it has a third account we made so our kids would stop polluting our recommendations with Cocomelon.