This is a good idea, because it allows translation to have the survey taker/respondent facing part of Limesurvey quickly up to date (usually simpler translations, short sentences anyway).

If the translation of the back-end takes a little longer, it is not that problematic as if we have untranslated strings presented to survey takers/respondents.

Vanilla forum have 2 translation file
https://www.transifex.com/vanilla/vanilla/dash_core/ and https://www.transifex.com/vanilla/vanilla/site_core/

@t6nnp6nn : yous speak fro Yii2 at forum . Can you look at Yii1 if we can have such system ?

Denis

I'm not entirely sure if this is what you asked. But..

Yii1 has a pretty similar way of generating translation files from source.
An example of conf file here:
http://stackoverflow.com/questions/20686600/config-files-to-generate-yii-translation-message-files

One can set the 'translator' option to change the default Yii::t translation function to something else. eg 'gT'. Tried to run that on Limesurvey, but Yii::t has Yii::t('category','message'), structure, so running that on Limesurvey and gT('message') will end up locating the LS message as categories.