Language change is working before uploading to Google Play Store but not after uploading to play store . Why?

The problem is that you’re using .aab file to publish app on play store . Which removes localization files based on the user’s phone settings when it’s been installing .

To solve that you need to put this lines in your build.gradle file and try uploading again

android {

  //... removed for brevity
  bundle {

     language {
       enableSplit = false
     }
   }
}

Link to refer