Swift localization

first need to setting project localization
    select project-> info -> localization
        click + sign and select required languages

in ios string files can add in two places
    for storyboard wise localization
        these strings cannot apply programatically
        in inspector tab select required locations
            this will create new string files in project->project name folder->  lancode.IProj folder -> Main.String
                if launcher storyboard localization added it will create LaunchScreen.strings file in same folder

        *** These language applied when user changed the device language in setting.
        when app specific language change can do by changing the budle as below. but user needs to restart the app to use these strings.

    programatically access strings
        select project-> new file -> String -> name as Localizable.strings (name should be this)
            this will create a file in  project-> Localizable.strings file
        select that file and click localize button in inspector tab
            select required languages
            add strings in this format
                "key" = "value";

        these string files access in program by attach bundle path to these files. to change path
            let path: String? = Bundle.main.path(forResource: lang, ofType: "lproj")
            if path == nil {
                bundle = Bundle.main
            }
            else {
                bundle = Bundle(path: path!)

            }