Andre,
I'm not sure why our translation strings aren't coming through correctly. Can you tell me what language your Joomla site is configured for?As to the other issues:
1) The user you are trying to login with has a Google account but *not* a Google+ account. You can enable the "Use OpenID if No Google+ Profile Exists:" setting in the Configuration -> Google area to allow non-Google+ users to register on your site.
2) There isn't a title in the login module normally. Since the user clicked "Login", the form shown is known to be for logging in. To add a title, you'd need to edit our template file for the login area. I can see that an option to show a title may be useful in the future though.
3) When fitted generates more than 20 javascript errors for working various functionality VirtualMart
You'll have to explain this one more or provide the error messages so that we can investigate further. If they are VM errors, I'm not sure we'll be able to fix them.
Thanks,
Alex