Here you can find the instructions on how to change success message text in Magento 2.
The “Success Message” is the notification message Magento store authorized users can see after adding the product to the Wish List.
1. Navigate to Magento admin panel and choose the Stores > Configuration section in the left side menu.
2. Then choose the TemplateMonster > Ajax Wishlist item on the new page on the left side.
3. Enter the text you want to display in the pop-up window after adding an item to your wishlist in the Success Message Text option field.
Example:
4. Clear the Magento cache.
5. Switch to the store frontend to see the result.
