willdurand/BazingaJsTranslationBundle — pull request #99 by nikolajosipovic (2014-03-25 10:52:30+00:00)
Title: Fallback to locale language before fallback locale. fr_FR > fr > fallback locale

Example:

Locale: fr_FR
Translation: fr
Fallback: en

Symfony by default searches for "fr" is "fr_FR" is not available. Checks that here as well.