Detecting current iPhone input language

Question

Does anybody knows, can I get the current input language and/or keyboard layout in iPhone application? Can I also get a notification when input language was changed?

Answer 1

From the Apple Reference Library - "Getting the Current Language and Locale":

NSUserDefaults* defs = [NSUserDefaults standardUserDefaults];
NSArray* languages = [defs objectForKey:@"AppleLanguages"];
NSString* preferredLang = [languages objectAtIndex:0];

Answer 2

You can add an observer to the default notification center:

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(inputModeDidChange:)
                                             name:@"UIKeyboardCurrentInputModeDidChangeNotification"
                                           object:nil];

This method prints the currently selected input language (like "en_US" or "de_DE"):

- (void)inputModeDidChange:(NSNotification*)notification
{
    id obj = [notification object];
    if ([obj respondsToSelector:@selector(inputModeLastUsedPreference)]) {
        id mode = [obj performSelector:@selector(inputModeLastUsedPreference)];
        NSLog(@"mode: %@", mode);
    }
}

BUT: All the above is not documented and you should not use it in shipping code!