You're right, we're actually trying to optimize the localized versions based on geo-localization, so you'd usually be redirected to French versions. In that case, we were just a bit behind on the translation of the [link|https://fr.ifixit.com/News/108569/trouver-la-bonne-piece-du-premier-coup-avec-le-verificateur-de-compatibilite-de-la-boutique-ifixit|French article about our new device picker], which is why you saw a 404.
You may choose the language for the newsletter, however. I've set yours to English right now, even though it seemed you aren't even subscribed, or maybe not with the same e-Mail address.
To change the language on our platform in the mobile version, click on the burger menu on the top left, then choose language / region.
To change the language in our store, click the flag icon in the menu bar and change to the European flag if you prefer English.
Let me know if that helps or if I can assist you any further!
