Open
modules\mod_hot_joomla_carousel_pro\mod_hot_joomla_carousel_pro.php,
around line 266 you will find this:
$output .= '<a class="readon" href="'.$link.$customItemIDHTML.'">'.JText::sprintf('Read more...').'</a>';
You can change read more text there.
Solution 2:
Open
language\en-GB\en-GB.mod_hot_joomla_carousel_pro.ini
in it add label translation like this:
Read more...=""Leer mas"
this way you can provide multilingual translation by using coresponding language file