Yes there is
Go to your language manager in extensions and click on English to be default. If it already is then do it again. This won't change the _link_s to english but all other text is english.
Also in the component under Joomshop click on Einstellungen and click on the first box in that and the first option in that is the language, make sure thats on english.
Hope this helps
Luke Chaffey
http://www.netreach.com.au