Safari Technology Preview 14 has not enabled translation in MacOs Catalina
Translation in Safari Technology Preview 14
Webpage Translation is only available on macOS Big Sur, iOS 14 and iPadOS 14. It isn't available on macOS Catalina, even with the latest Safari Technology Preview.
Dear I have macOS Big Sur, iOS 14 and iPadOS 14. all of them the translate service in safari not available, you can't see it.
Yeah I installed bigger today(not beta version). Safari does not have translation, its missing.