Translate a webpage in Safari on Mac -
In the Safari app on your Mac, go to the webpage you want to translate. If the webpage can be translated, the Smart Search field displays the Translate button.
Click the Translate button, then choose a language.
Launch Safari on your iPhone or iPad -
Visit a webpage that's in a language you'd like to translate and watch for the address bar to indicate that a translation is available. Tap the aA button in the far-left of the address bar, then select Translate to [Language] in the dropdown menu