some numbers are display with "x,000" in some languages.

For example under Preferences > Mail > "Check for new mail every: "
In English its: "2 Minutes"
In German: "2,000 Minuten"

I tried several languages:

Problem occurs with: German, Danish, Italiano
Occurs not with: Englisch, French

I thougt it would be something in /opt/zimbra/jetty/webapps/zimbra/WEB-INF/classes/messages/I18nMsg_de.properties

But I didn't found something.