All blogs panel panel in multiblog mode uses wrong language in french

This is about the feature added for BLOG-95 , it uses the "Billet" terminology in french, when it's actually listing blogs, if there are multiple blogs present on the wiki:

See my comment in https://github.com/xwiki-contrib/application-blog/commit/9f8b39f8b66406225c9363bfaee933e32f42caec#commitcomment-44433054 about how this ended up happening.