Replacing the span selector “or” text with something else

Hi,
I am using your plugin, its really great!

However, I would like to change value of span selector which is located after class=”yith-wcwl-icon fa fa-heart”

See the code below.

<div class="yith-wcwl-add-button">
	<a href="?remove_from_wishlist=431&_wpnonce=d7923ae91d" class="delete_item  " data-item-id="45" data-product-id="431" data-original-product-id="431" data-title="Vom Wunschzettel entfernen" rel="nofollow">
		<i class="yith-wcwl-icon fa fa-heart"></i>		Vom Wunschzettel entfernen	</a>

			<span class="separator">or</span>
		<a href="https://moebel-lab.de/wishlist/view/0BWDSWU8FX6V/" class="view-wishlist">Siehe Wunschliste</a>
	</div>

I’ve tried change it already in CSS code using tags: display:none; | visibility | opacity | etc.
I wasnn’t able to succed.
Each time i was able to add my wanted value after or before “or” which was supposed to hide/delete from span class.
I’ve tested my soultions on W3Schools and there it worked.

I don’t know what to do now.
Could you please help me?