We support automatic field and Chatter translation on the Lightning Experience UI. You can translate any visible piece of text on the page to the user's preferred language.
Example text translation screenshots of Lightning UI and Community UI.
Record Detail page from English (Any Language) to Russian (Any Language).
Record Detail page from English to Japanese.
Report translation from English to Spanish.
Take text from one field, translate and update another field on Custom Lightning UI components.
The following video demonstrates real-time translation on a Lightning Salesforce community. The same experience is possible on the Lightning Experience standard record detail pages for field translation - https://www.youtube.com/watch?v=4XnB1MldjbU
Can you please share screenshots of the places where you would like the translation to occur, we will be happy to share the necessary setup insurrections.