Change Navigation Language Google Maps

I got a new OnePlus One recently and have noticed that the Google Maps Navigation Voice is in English (India) ( I bought the phone in India). This is very annoying and refuses to change no matter how much i change the TTS settings and delete the English(India) voice. It just redownloads and speaks in that voice. It is just fine English (US) on a Moto X I also bought in India (App not Updated).So my questions: a) Is this a "feature"? b) How do I fix it? I would like the English(US) Google TTS voice to work.