Hello,
Add this code in Theme Options > Custom CSS > Custom CSS for desktop:
.top-bar .wpml-ls-legacy-dropdown a, .top-bar .wpml-ls-legacy-dropdown a:hover {
background-color: transparent;
border: none;
color: white;
}
.top-bar .wcml-cs-active-currency {
padding: 7px 10px;
}
Regards