Your App Bundle targets the following unrecognized languages: gr.

[nabin304]

When I try to publish an app on Google Play store, which reference this library (Xamarin.RateThisApp v1.2.0) does not work.

Details error message:
Your App Bundle targets the following unrecognized languages: gr. The list of supported language codes can be found in the IANA registry.
Invalid languages caused by third-party libraries can be excluded using the resConfigs Gradle property.

[trinnguyen]

Add this MSBuild property to your Xamarin.Android .csproj would solve the issue, assume that your project use a single "en" resource set.

<AndroidAapt2LinkExtraArgs>-c en</AndroidAapt2LinkExtraArgs>

You can add more configurations after "-c" arguments. They will be passed to aapt2 cmd as extra arguments. In case of using aapt, use this property instead: AndroidResgenExtraArgs

The reason behind this is that the native RateThisApp library has translation strings for many configurations including "gr". They are all packed together into the AppBundle package. This extras arguments make sure only some configurations are added, hence prevents the rejection error.

[nabin304]

Thanks a lot, it worked.