I came across this answer after reading a post on the pyro forums. Let me also contribute here:
I think taking a look at the Pyro-related Gallery module created by the development team will give you a clear idea of ββhow to take care of this.
In galleries, language files follow this structure: modules / galleries / language / language-name / galleries_lang.php
Around 3, I think they should be placed in system / cms / language / lang-name / (and if you can, you should contribute to the Gibbis language of the Pyro community :))
I'm not 100% sure about 4, but I'm sure I saw something in the docs.
Nacho source share