Hi,
You need to edit these files :
1.
mod_relateditems_xtd.xml. put this code below anywhere in the file:
<field name="modtittle" type="text" default="Related Article" label="Mod Title" description="Mod Title" />
2. file
default.php and
slideout.php, add this code below arround line 27 (default.php) or line 20 for slideout.php :
$modtittle = $params->get('modtittle', 'Related');
then find this code in both of default.php and slideout.php :
<span><?php echo JText::_('RELATED_ARTICLE'); ?></span>
replace with :
<span><?php echo $modtittle; ?></span>
Now you can change the module title from the module backend
