Hi,
Here is the page code if it help:
Look like the module is loading blank.png for each respective languages "/tmpl/lang/blank.png":
<a href="javascript:doTranslate('en|en')" title="English" class="flag" style="background-position:-0px -0px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="English" /></a> <a href="javascript:doTranslate('en|ar')" title="Arabic" class="flag" style="background-position:-100px -0px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Arabic" /></a> <a href="javascript:doTranslate('en|zh-CN')" title="Chinese (Simplified)" class="flag" style="background-position:-300px -0px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Chinese (Simplified)" /></a> <a href="javascript:doTranslate('en|zh-TW')" title="Chinese (Traditional)" class="flag" style="background-position:-400px -0px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Chinese (Traditional)" /></a> <a href="javascript:doTranslate('en|fr')" title="French" class="flag" style="background-position:-200px -100px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="French" /></a> <a href="javascript:doTranslate('en|de')" title="German" class="flag" style="background-position:-300px -100px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="German" /></a> <a href="javascript:doTranslate('en|it')" title="Italian" class="flag" style="background-position:-600px -100px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Italian" /></a> <a href="javascript:doTranslate('en|ja')" title="Japanese" class="flag" style="background-position:-700px -100px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Japanese" /></a> <a href="javascript:doTranslate('en|ko')" title="Korean" class="flag" style="background-position:-0px -200px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Korean" /></a> <a href="javascript:doTranslate('en|pl')" title="Polish" class="flag" style="background-position:-200px -200px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Polish" /></a> <a href="javascript:doTranslate('en|pt')" title="Portuguese" class="flag" style="background-position:-300px -200px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Portuguese" /></a> <a href="javascript:doTranslate('en|ru')" title="Russian" class="flag" style="background-position:-500px -200px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Russian" /></a> <a href="javascript:doTranslate('en|es')" title="Spanish" class="flag" style="background-position:-600px -200px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Spanish" /></a> <a href="javascript:doTranslate('en|th')" title="Thai" class="flag" style="background-position:-0px -500px;"><img src="/modules/mod_gtranslate/tmpl/lang/blank.png" height="24" width="24" alt="Thai" /></a>
</div></div></section>
Thanks.