Hello,

You can rewrite all theme and plugin texts via PO file in WordPress. Here is a video tutorial that should help you translate your website texts with a Loco Translate plugin https://www.youtube.com/watch?v=D3NsDdMzsls&list=PLMw6W4rAaOgKKv0oexGHzpWBg1imvrval&index=3

In order to replace the icon, use this code:

.sizeguide-btn-wrapp a:before {
    content: "\f438";
    font-family: woodmart-font;
}

You can insert your icon from https://fontawesome.com/v4.7.0/

Best Regards