Tweak language notification to avoid formatValue
languageNotification currently uses the async formatValue to get the notification body. But gNotificationBox actually accepts a { "l10n-id", "l10n-args" } object in place of a label.
languageNotification currently uses the async formatValue to get the notification body. But gNotificationBox actually accepts a { "l10n-id", "l10n-args" } object in place of a label.