Add HTML <span> to single choice

Hi, 

I am trying to add some color to the list of questions in the single choice widget for a specifque word. So I added some HTML span in the question list in order to manipulate it after with  CSS: 

The HTML span used is the following : <p>They …. on the bus  <span class="ingredient">==>Fr:</span>    Ils sont dans le bus   </p> 

It's seems that H5P intrepret it as a text not as a HTML text, please see the output attached

Could you please help to resolve this issue. 

Thank you in advance for your support.

Best regards.