Use the following code if u want to show different logo image in different language pages in Opencart sites.
This code Also solves / helps
1. Changing language and changing logo instantly…there is no lapses or need to refresh the page again
*** i used this code in Journal2 theme and i had to modify the following file
/public_html/catalog/view/theme/journal2/template/journal2/headers/center.nosecond.tpl
but depending on your opencart theme you may need to modify the header.tpl file
<?php if ( $lang=='ar') { ?>
<div id="logo"><a href="<?php echo $home; ?>"><img src="/image/LOGODONEARABIC.png" title="<?php echo $name; ?>" alt="<?php echo $name; ?>" /></a> </div>
<?php } ?>
<?php if ( $lang=='en' ) { ?>
<div id="logo"><a href="<?php echo $home; ?>"><img src="<?php echo $logo; ?>" title="<?php echo $name; ?>" alt="<?php echo $name; ?>" /></a></div>
<?php } ?>
If you have any issue feel free to ask me question here in comments section
All About Basic 