Most of Amazon’s regional websites offer machine-translation (although the language selection varies by region). Click the Flag next to the search field on the front page.
"Most" is not the case in Europe, AFAIK the only non English speaking country that has an English version is Amazon DE. I usually end up searching for products there, then copying the ASIN and searching on Amazon in my neighbouring country (as they aren't available here [0]).
I really don't understand why e-commerce services do this, especially when the UI behind the scenes supports i18n and has translations. Amazon do have country specific listings, so maybe they just don't want to show two languages, but that is often what happens on Amazon DE if you choose English. If you choose to ship to a different country they will change prices to account for different taxes, so it's not that.
Other e-commerce services are even worse, e.g. Zalando has a single app for all their countries, and the listings are the same, but they don't let you choose the language at all. Just because I am living in a country, doesn't mean I speak the language of that country.
[0] Which is another weird thing, as most of the time they do ship here. I'm somewhat surprised they have't merged to a single "Amazon Europe" storefront, instead they are still opening new country specific storefronts.
i hate the english version of amazon.de, for some reason amazon keeps activating this for me, and now whenever i type in an english book title it "helpfully" translates it to german
I have this issue with Amazon Japan; it's frequently related to clicking links from friends or Google that have the language setting encoded in the URL, which changes my personal settings.
My browser is in English, with an accept header preference for English. But that does not mean, that I want shitty machine translated versions.
After all, German is also in my accept header, so if that’s the only real version, please give me that one.
Amazon France annoyingly does not offer an English UI. I’m so looking forward for Firefox Translations to add support for French-to-English translations.