My store is not in English. Can I translate the information showed in the app to another language?

You can adjust all user interface texts from the app preferences page. 

In this case, you will need to locate the following options on the preferences page to make the correct changes and input the desired information in your preferred language:

The title, inside the 'Title' section, in the Visual preferences: The Add to cart texts, inside the 'Product Add to Cart' section, in the Visual preferences: