Excel file with web text - how do I create a project and define non-translatable items?

I received an Excel file into which my client has copied text from a website. So the text is full of tags and elements that I need to mark as non-translatables, but I have absolutely no idea of how to do this.

If I simply create a project and add the file all those elements appear as ordinary text.

How can I prepare the file so that such elements are changes to non-translatable/tags?



Here some examples of the text:

l </strong>[EMAIL_ADDRESS] <strong>or call </strong>[PHONE_NUMBER]<strong>.</strong></h3

div class="row">
   <div class="hidden-xs col-sm-3 sidebar-nav">
    <h5>
     Most Popular Services</h5>
    <ul>
    <ul>
    <li>
        Russian applications</li>
    <li>
?</strong>&nbsp; [BRAND_NAME] can accommodate
 </div>
 <!-- .cycle-slideshow --></div>
<!-- #slideshow-wrapper -->
<div class="[domainCountry]-message">
 <p>