Needs PLURAL support ass per MW:i18n#Pass the number of list items as parameters to messages talking about lists.
Sorry for the long delay. I only just got an email alert about this on Monday.
I don't think we need to worry about plural support here. The message points to a single array, not it's content.
Thanks for your help in translating! (Und dann auch noch Kölsch! Da lacht mein rheinisches Herz.)