Update - now working with wowhead and a couple of features added.

New version to fix backslash problem :)

Sorry found some additional bugs so here is another fix!

Ooo I'm not sure!

For starters just change the links from "http://www.wowhead.com" to "http://de.wowhead.com" and see what happens.
Edit the following lines in item_dbs\wowdb.inc (open it in wordpad/notepad)

original:
define('WOWDB_BASE_URL', 'http://www.wowhead.com');
change to:
define('WOWDB_BASE_URL', 'http://de.wowhead.com');

original:
if ($url!="http://www.wowhead.com/?item=") {
change to:
if ($url!="http://de.wowhead.com/?item=") {

original:
drupal_set_html_head('<script src="http://www.wowhead.com/widgets/power.js"></script>'."\n");
change to:
drupal_set_html_head('<script src="http://de.wowhead.com/widgets/power.js"></script>'."\n");

You could also change the lines:
return t('Converts [item] tags to links/tooltips of the configured item database (WoW Head is the default).', array('!url' =>

And:
return t('You can include [item][/item] tags to automatically link the items to WoW Head. Either use the Item ID ([item]1234[/item]) or the exact name ([item]Earthwarden[/item])', array('!url' => WOWDB_BASE_URL));

To something more German if you wish. Good luck and let me know how it goes!

Try testing with a new item and/or clearing the cache from the site. This tricked me up quite a few times!!

I've checked out de.wowhead.com and unfortunately it looks like they use google search to search the german site :(

This means that you'll have to write new rules to get it working when it encounters an item with more than one hit. Some items such as [item]Splitterbesetzte Gamaschen[/item] should work however, and you should be able to use [item]27632[/item]

If you wanted to get it working with the search you will have to find out how to mod the line to look for the name: ie Terokks Federkiel - Gegenstand in the code and pull out the item number. Not easy!

Ah Brilliant! This is much closer to how Lootz works with wowhead! :)

Let me know how you get on, and if you get stuck.

Hey no probs guys happy to help :)

Marverick this is more Prof BikeyBike's area than mine, but I think once Lootz looks up a few items it will save them to an internal database rather than do a look up each time. Try adding in 20 items, saving the page, editing it and adding 20 more etc until you have all the links working. Also increasing the script timeout in your php.ini would help if you have access to the webserver. Once the whole page has been rendered it will be cached so it will be quicker the next time it opens.

Let me know how you get on.