What is the second parameter of NSLocalizedString()?
ios, localization, objective-c, swift, xcode
Solution
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.
Problem
What is the `*comment` parameter in: ``` NSString *NSLocalizedString(NSString *key, NSString *comment) ``` If I do this: ``` NSLocalizedString(@"Hello_World_Key", @"Hello World") ``` and have two versions of a Localizable.strings (English and Spanish), does each need the entry: ``` English.lproj/Localization.strings: @"Hello_World_Key" = @"Hello World"; Spanish.lproj/Localization.strings: @"Hello_World_Key" = @"Hola Mundo"; ``` Isn't the English one redundant?