Yes, but you MAY have to purchase the English language pack (about 30 U.S.
dollars).
Try the following:
1. Start Menu -> Programs -> Microsoft Office -> Tools -> Language Settings
2. At the top, look for a tab labelled something like "Display Language" or
"Menu Language". If it isn't there, then German is currently your only
option, and you'll have to purchase the English language pack at the website
I list below.
3. Click the tab mentioned above and change "display language" to English.
If English isn't in the list, then you'll have to purchase the English
language pack to get the option to switch to English.
http://office.microsoft.com/en-us/suites/FX102113661033.aspx