Hello,
Thank you for using our theme! 1) Read here how to translate theme https://xstore.helpscoutdocs.com/article/30-base-theme-translation You need to translate XStore theme and also XStore core plugin. 2) Follow theme documentation and set recommended options for the YITH > Wishlist > Add to wishlist options > Icon https://xstore.helpscoutdocs.com/article/102-wishlist
Feel free to ask if you have any other questions.
Regards
