pay per view adjust wordpress login button

Hello,

I don't like the Login With Wordpress button. It creates confusion between wordpress.org and the site, which users do not know is a "wordpress based site" I have been trying to change the details of the button but without success.

So two things.
1. The language file.
creating a en_GB.mo or a PPW-en_GB.mo haven't changed the text. What is the correct method of changing the language.
2. The Wordpress Logo needs to be removed.

Please let me know how this is to be done.

Many Thanks