room.closeMeeting: "Meeting beenden"
or alternatively "Meeting abschließen"
room.about: "Über"
on software often also like "Über multiparty-meeting" or "Info" / "Informationen" in general
"Impressum" is more like "imprint" / "legal info" on a website, ..
but depends on what it's ment to be
label.medium: "Mittel"
better (true) german, "Medium" obtained on quality is german-english mix (or has other meaning)
label.appearence: "Ansicht"
shorter, more often used on software .. alternatively "Aussehen" or "Anzeige"
mi4aux