They are translated on your average Linux distribution though, you won't see nautilus but "Files", gnome-software but "Software", Gnome snapshot but "Camera" (I've put the English term here but each term will be translated to your language). See https://apps.gnome.org and switch the language to see.

In comparison, both MacOS and Windows look more amateur with some leftovers not translated. (Like "Windows Update" on Windows for example)