Switch language in app

gistfile1.m

    // select language from application's localizations
    NSBundle *mainBundle = [NSBundle mainBundle];
    NSArray *localizations = mainBundle.localizations;
    NSString *localization = localizations.lastObject;
    
    // search bundle contains Localizable.string
    NSURL *URL = [mainBundle URLForResource:@"Localizable" withExtension:@"strings" subdirectory:nil localization:localization];
    NSBundle *bundle = [NSBundle bundleWithURL:URL.URLByDeletingLastPathComponent];
    
    // get localized string from bundle
    NSString *string;
    string = NSLocalizedStringFromTableInBundle(@"test", nil, bundle, nil);
    NSLog(@"%@", string);