If you want to translate the app in Italian you have to create the folder values-it under planes/java/PlanesAndroid/app/src/main/res then copy there the file strings.xml from planes/java/PlanesAndroid/app/src/main/res/values then replace in the file the english texts with the italian texts.
Thank you for your pull request.
If you want to translate the app in Italian you have to create the folder values-it under planes/java/PlanesAndroid/app/src/main/res then copy there the file strings.xml from planes/java/PlanesAndroid/app/src/main/res/values then replace in the file the english texts with the italian texts.