To change the language of an app as same as your store, this option will help you. You can change the language of Review Section, tab, Button, Write a Review, Question, etc.
Please Go to App admin --> Settings --> Settings --> Language Settings.
You just need to put the text in that text field as per the given related titles.
1. Review Section--> you can change the language of the review section.
2. Tab --> you can change the language of tab texts.
3. Button--> You can change the language of buttons.
4. Write a review --> You can change the language of the review form.
5. Question--> Yu can change the language of the question/answer section.
Note: Please do not forget to Save the changes you made.