Investigate using JMSTranslationBundle's FileExtractor's

[deanc]

JMSTranslationBundle supports the extracting of translation strings from twig templates and PHP files. It's not very well documented how to use, so it requires investigation on how this could be achieved. The end-goal of course being to put any missing translation strings into the primary language's translation file.

http://jmsyst.com/bundles/JMSTranslationBundle/master/usage#extracting-translation-messages