What is the
NSString *NSLocalizedString(NSString *key, NSString *comment)
NSLocalizedString(@"Hello_World_Key", @"Hello World")
English.lproj/Localization.strings: @"Hello_World_Key" = @"Hello World";
Spanish.lproj/Localization.strings: @"Hello_World_Key" = @"Hola Mundo";
The comment string is ignored by the application. It is used for a translator's benefit, to add meaning to the contextual usage of the key where it is found in your application.
For example, the
Hello_World_Key key may take different values in a given language, depending on how formal or informal the
Hello World phrase needs to be in that language ("What's up World", "Yo World", "Good Day World", etc.).
You can add a string in the comment field to hint this usage to the translator, who will (one would presume) be better able to localize your application.