You are developing a German language theme for the Magento Marketplace named mytheme. In your Magento installation you have a third-party German language package installed.

The theme “mytheme” already contains a mytheme/i18n/de_DE.csv file. The graphic designer wants you to rename the Add to Cart button to make the text shorter.

Keeping upgradability in mind, where do you add the new string?

• Override the Magento_Catalog/view/frontend/templates/product/view/addtocart.phtml template in mytheme and replace the string.

• Add the string to mytheme/i18n/de_DE.csv

• Add the string to the third-party German language package

• Add the translation to the core_translate database table