On my website: if i switch to Chinese language the flag is not changing in the language switcher? The other languages are working fine. E.g. if you switch to French, its showing the French flag...

On my website: if i switch to Chinese language the flag is not changing in the language switcher? The other languages are working fine. E.g. if you switch to French, its showing the French flag...

This is the language.phtml i am using:

<?php if(count($this->getStores())>1): ?>
<div class="polyglot-language-switcher" data-grid-columns="1" data-anim-effect="fade" data-open-mode="click" data-anim-speed="0.1" >
    <ul style="display: none">
        <?php foreach ($this->getStores() as $_lang):?>
                <li><a href="<?php echo $_lang->getCurrentUrl() ?>" title="<?php echo $this->htmlEscape($_lang->getName()) ?>" data-lang-id="<?php echo $this->htmlEscape($_lang->getCode()) ?>"><img src="<?php echo $this->getSkinUrl('images/flags/' . $_lang->getCode() . '.png');?>" alt=""> <?php echo $this->htmlEscape($_lang->getName()) ?></a></li>
        <?php endforeach;?>
    </ul>
</div>
<?php endif; ?>