Plugin Globalite --localization_missing--

Hello,

I decided to use the plugin Globalite to automatically translate the
error messages in French and German. I’ve then downloaded the plugin
(vendor/plugins/svn…) and I’ve created a file fr-FR.yml and de-DE.yml in
vendor/plugins/svn/spec/lang/ui/.

When I fill the form wrong, I receive the error messages not in French
or German but I see “—localization_missing—“.

Someone has an idea hereabout? Where has the localization to be
defined?

Thanks you in advance,