Hello,
Please submit separate topics for different questions next time.
1/ Follow this article – https://xstore.helpscoutdocs.com/article/30-base-theme-translation
2/ About image size read here – https://xstore.helpscoutdocs.com/article/89-product-images It is recommended to use a graphics editor and prepare product images (make them the same size) before uploading images to your media gallery.
3/ Edit Footer using Elementor > change colors in the custom CSS code – https://prnt.sc/20×8586
4/ Do not update Core plugin before the theme update next time. Follow this article to update the theme – https://xstore.helpscoutdocs.com/article/63-theme-update Don’t forget to make backup before update.
Regards