mate-translate

Install command: 
brew install --cask mate-translate

Name: Mate Translate

Select text in any app and translate it

https://twopeoplesoftware.com/mate

Cask JSON API: /api/cask/mate-translate.json

Cask code: mate-translate.rb on GitHub

Current version: 8.3.3

Requirements: macOS >= 10.15

Analytics:

Installs (30 days)
mate-translate 13
Installs (90 days)
mate-translate 34
Installs (365 days)
mate-translate 173