Part of macOS
naturallanguagedLanguage and translation
○ Leave it
Powers translation and understanding of text.
What it is
Handles on-device translation and language features for apps.
If you stop it
macOS starts it again straight away. Leave it.
The verdict
○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.
In Activity Monitor
naturallanguagedtranslationdlanguageassetdhandwritingd
From Procession’s guide, in the words the app shows.