Not sure, it happened on mobile Firefox. My point is that there should be a way to disable it and switch to a different language manually.

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Aachen 2 hours ago | parent [-]

https://wutools.com/dev/testing-debugging/http-header-viewer

First hit for 'check http headers', in case that helps find out why websites think you want Chinese content. Maybe it's a bug in the website; maybe it's set as your first preference. Please report the bug if there is one!

	▲	cyberax an hour ago \| parent [-]
		And I'm actually stumped. Firefox is just sending `en-US` on mobile. I have no idea why it selected Mandarin. I can switch back to English by using the "desktop site" feature that _does_ have a language dropdown.