I don't think it will translate because it is in the code as a string. If you hit Ctrl+F in the wp-parallax-content-slider.php, and search for Read More, you will find it here:
$outputSlide .= "<a href='".$link_article."' class='da-link'>Read More</a>"."\n";
Then just change the Read More text as needed, but it won't translate dynamically unfortunately.