Safari's built-in language translation feature is for modern versions of Safari and macOS, so as long as you're running Safari 14 or newer in macOS Big Sur or newer, you’ll be good to go. Here's how you can translate webpages:
• Launch Safari and head over to the website that needs to be translated.
• Once the page loads up, you’ll notice a new Translate icon on the right side of the address bar.
• Click on the Translate icon and choose "Translate to English". Also, keep a note of the Preferred Languages option for now if you're interested in translating to a different language.
• Since you're using the built-in translator for the first time, you'll get a pop-up. Click on "Enable Translation" to continue.
• The page will now be translated into English. If you want to access the original page for any reason, click on the translate icon and choose "View Original".
• If you want to translate the page to a different language, click on "Preferred Languages...". This will take you to the "Language & Region" settings on your Mac. Here, click on the "+" icon under Preferred languages.
• Simply select the language you want to use and click on "Add". Now, this language will also be available in the translation menu along with English.
Current supported languages for translation are English, Spanish, Simplified Chinese, French, German, Russian, and Brazilian Portuguese.