After some time spending on that I found solution. In fact the answer was setting Region Format to other language, and than change main file to look like this:
int main(int argc, char *argv[])
{
@autoreleasepool {
if ([[[NSLocale currentLocale]localeIdentifier]isEqualToString:@"sl_SI"]) {
[[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"sl", nil] forKey:@"AppleLanguages"];
} else {
[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"AppleLanguages"];
}
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}
for setting language to Slovenian. For other language to it similar.