Example how to use the maven plugin to find missing translation
Look at the pom (https://github.com/samyBadjoudj/missing-translation-checker-maven-plugin-usage/blob/master/pom.xml) to see how it is configured.
I have put the interesting part of the mvn clean install output
[WARNING] Can't find/open file /Users/sbadjoudj/tp/missing-translation-checker-maven-plugin-usage/missing-translation-checker-maven-plugin-usage/src/main/resources/MessagesBundle_de_US.properties
[WARNING] [Missing translations for MessagesBundle_fr_FR.properties]
[WARNING] -> added.property
[WARNING] [Missing translations for MessagesBundle_de_DE.properties]
[WARNING] -> french.only.property
-> added.property
Samy Badjoudj