All trl(...) strings need to be collected into a single po file used as a base to translate into different languages.
Translated po files need to be present in /trl folder during build to be used.
Parse your content
Add https://github.com/koala-framework/kwf-trl to your project composer.json and run "composer update"
It does add a script to parse your code. In your web folder just call
This creates a po file containing every text masked with trl(...) in all of your web branches.
Use this po file as base for your translations.