Have you tried updating your device level language and location settings by using these steps: https://goo.gl/df9vko ? Hope this helps.
Thanks for all the details. Do let us know if it happens again and we'll look into it.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Thanks for all the details. Do let us know if it happens again and we'll look into it.