1.1.5.4. optin.osx.cocoa.localizability.NonLocalizedStringChecker (ObjC)
Warns about uses of non-localized NSStrings passed to UI methods expecting localized NSStrings.

Examples:

NSString *alarmText =
  NSLocalizedString(@"Enabled", @"Indicates alarm is turned on");
if (!isEnabled) {
  alarmText = @"Disabled";
}
UILabel *alarmStateLabel = [[UILabel alloc] init];

// Warning: User-facing text should use localized string macro
[alarmStateLabel setText:alarmText];