I would like to remove the tekst and "(" and ")" for the comments link in the category_item list view, only the number to be linked is enough for me.
But I can't change it in de template? How can i change this?

If got the following code:

This is the default code
github.com/getk2/k2/blob/master/components/com_k2/templates/default/category_item.php#L252-L270

As you can see, <?php echo $this->item->numOfComments; ?> only returns the number,
If you are still getting language strings, make sure you have edited the correct files. www.joomlaworks.net/blog/item/194-k2-inheritance-sub-templating