This Repository's example Simple and Easy Task - ( Coordinator + MVC )
The first step it's install twine and python3 for multi-languages application. Of course, you can use iString but this app in the progress of updating for YOU Guys.
# If you use RVM: Use rvm use system
# THEN
# sudo gem install twine
# It because XCODE want to run RVM as system
# If you are not using RVM:
# For installing twine need to use sudo gem install twine --user-install
Also this comment you can find in twine.sh
Simple answer - ENUM
Yep, for easy using twine, was added LocalizationsKeyGeneration.py which generate for you localization keys =)