Thanks I was able to do it, from storefront / view / your-theme-name / template / common I deleted the lines:
<section class = "copyrightbottom align_center">
<h2 class = "hidden"> & nbsp; </h2>
<div class = "container-fluid">
<div class = "pull-left mt5">
<? php echo $ {$ children_blocks [6]}; ?>
</div>
<div class = "pull-right align_center">
<? php echo $ text_project_label?>
<br/>
<? php echo $ text_copy; ?>
</div>
<div class = "pull-right mr20 mt5">
<? php echo $ {$ children_blocks [7]}; ?>
</div>
</div>
</section>
And with firefox inspector I modified them with the text and link that I wanted to put.