Sign Out When Sign In http://forums.adobe.com/thread/1450581?tstart=0 may help
-and http://helpx.adobe.com/creative-cloud/kb/unable-login-creative-cloud-248.html
-and 'looping' https://forums.adobe.com/thread/1504792
or
http://helpx.adobe.com/creative-cloud/kb/change-installed-language.html and
http://helpx.adobe.com/x-productkb/policy-pricing/order-product-platform-language-swap.htm l