Implementing Interactive SVG Graphics

but on your target page you did not use the svg. there is only a png.
Try to place your svg code inside a codeblock element – give the codeblock element a custom class: wordcloud.
Then try to transfer those scripts to the enfold theme

as mentioned above : codeblock with your svg code inside and custom class: wordcloud

codeblock is important – because you need that svg as inline-svg – not as img

this is the function i only transfered to child-theme functions.php:
(in my case only for that example page (page id: 44324))

function wordcloud_trigger_images() { 
if(is_page(44324)){
?>
<script type="text/javascript">
  var wordcloud = document.getElementsByClassName('wordcloud')[0];

  if (wordcloud) {
    var triggerword = document.querySelectorAll(".wordcloud g[id^='Trigger_']");
    var wordgroups = document.querySelectorAll(".wordcloud g[id^='Box_']");
    Array.from(triggerword).forEach(function (t) {
      t.addEventListener('click', function (e) {
        var triggerid = this.id;
        var triggertargetid = triggerid.replace('Trigger', 'Box');
        Array.from(wordgroups).forEach(function (w) {
          w.classList.remove('is-visible');
        });
        document.getElementById(triggertargetid).classList.add('is-visible');
      });
    });
  } 
</script>
<?php 
}
}
add_action('wp_footer', 'wordcloud_trigger_images');

your svg code : https://pastebin.com/Sw5Nyr3m

the quick css:

.wordcloud {
  margin: 2rem auto;
}

.wordcloud svg {
  width: 100%;
  height: auto;
}

.wordcloud svg g[id^=Trigger_] {
  cursor: pointer;
  display: block;
}

.wordcloud svg g[id^=Box_] {
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s;
}

.wordcloud svg g[id^=Box_].is-visible {
  opacity: 1;
}

.wordcloud path {
  pointer-events: none !important;
}

see: https://webers-testseite.de/wertarbeit/

PS: one little error is on your svg code on “Durchblicker” it is the only trigger without a rect inside to have a clickable area – so you had to aim exactly the “letters” if the mouse is over a space – there is no pointer. – on my svg code on pastebin i added that missing rect.