Yet if I enter that in Architect I get:
title: i10n.translate("checkin.error.nickname", 3, 25) // 1st way
title: Messages.CHECKIN_ERROR // 2nd way
That's exactly my problem. Architect escapes everything as String. Otherwise I would not have posted this.
title: 'i10n.translate("checkin.error.nickname", 3, 25)' // 1st way
title: "Messages.CHECKIN_ERROR" // 2nd way