Roseverte would not show anything stored from you to the third party. I treat personal information very carefully and this page will inform you what kind of information might be collected from your purchase.
For apps which contain in app purchase items: whenever there is a purchase or restore request, your transaction ID, the app's name and the in app purchase's item name would be stored to Roseverte database. This is to confirm which purchase is succeeded, so that if there's any issue with the purchase, this data would be able to help to settle the issue.
For multilanguage app: the app will learn your system language and start the app with the same language if it's supported. This information would not be revealed to anyone.
For paid app and completely free apps: there is no information that would be collected from you.