Change Navigation Button Text on Certain Pages

Hi there! 
 
I would like to change the button text on my navigation button on certain pages. 

Any suggestions how to do this? 

https://www.vanilse.com/

Thanks! 

Suppose you want to rename text on Contact Page, you can add this code to Contact Page Header Code Injection.

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
   $("a.btn").html(function() { 
          return $(this).html().replace("Maak een Afspraak", "new text");  
    });
});
</script>