Why it's a terrible idea to use flags or country names on your language selector, #88,248,324. Seriously, explain this to me.
Apparently, if you're a customer in China, they want you to use the English site rather than the Traditional Chinese site. But that's okay, because clicking on "English" next to the Chinese flag takes you to a page in simplified Chinese anyway.
https://www.liqui-moly.com/en/pt/ (yep, that's the URL)