A Symfony 1.2 plugin is used for generating I18N using a Google Doc
https://github.com/mobilejazz/Colloc
./symfony colloc:i18n-extract --application=frontend --env=dev "https://docs.google.com/spreadsheets/d/1ByRbZAYaJaCwPSyd3n5XdrdVrH2V5DSf7yp5QO5ci04/export?format=tsv&id=1kbN3a31DKmhC17w5dWDB4G-7JACyi5BeFzHHV9qasMg&gid=731235557"