My android app is developed with Xamarin Android for Visual Studio 2015 SP2. It is published in Google Play and is operating successfully for half a year.
Now I try to apply Google search indexing to my app and bind it to my website.
I created an APK with Intent filter applied and try to test it in the Search Console with the Fetch as Google tool.
With the blank app URI and language set to English I can successfully fetch the main page of my app.
Partial
Fetched with some missing resources. Learn more
APK version: Local upload - ru.noxx.polyglot16-Sig... [5/13/16, 9:40 AM]
Fetched URI: android-app://ru.noxx.polyglot16/
Date: 5/13/16 9:40 AM
Language: English
Googlebot type: Google for android apps
The problem is when I change the language to Russian I get the dreadful 'internal error':
Internal error
The page could not be fetched due to an internal Google error.
APK version: Local upload - ru.noxx.polyglot16-Sig... [5/13/16, 9:40 AM]
Fetched URI: android-app://ru.noxx.polyglot16/
Date: 5/13/16 9:45 AM
Language: Russian
Googlebot type: Google for android apps
My app is not localized. It's primary language is Russian and it has no localizations to any other language and that is by design.
Should I worry about the error or should I just use English for the test purposes?