This module was developed to simplify the life of the developer by using yml files to ensure string translation.

You need juste to enable the module and add yml under config/locale with pattern [langcode.yml] file like below

config/locale/fr.yml
fr:
config:
title: 'Translation configuration files'
description:
msgid: "Translation configuration files"
msgstr: "Configuration des fichiers de traductions"

If you specify a msgid / msgstr properties you can access and override the translation string in backoffice