Say the source file is called "i18n.properties". Pushing translations (i18n_en.properties, i18n_es.properties, ...) via the zanata-maven-plugin to this particular source-file works fine.
But if the source file is called "i18n*_de*.properties" with the language code suffix then it's not pushing any translations to it.
"sourceLang" in the zanata-maven-plugin configuration is set to the language code of the source file. In this case "de".