Hello,
Try this CSS to change the color:
.whb-color-light .search-button>a, .whb-color-light .whb-header-links .item-level-0>a:hover{
color:yellow;
}
Put this CSS into Theme Settings > Custom CSS Change yellow for your color.
You can translate 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
Best Regards
.
