Well, I have no interest of making a translation of that, but I left just the solution for those who have the same problem.
- In /usr/share/icons/hicolor/NxN/apps/ , where N is 16, 22, 24, 32, 48, 64, 128, 256, there are files named google-earth.png. You just need to copy those files to googleearth.png on the same carpets.
This is because, for some reason, the script for the application is /opt/google/earth/free/googleearth, but this one is accessed by google-earth.desktop through the link google-earth.
I hope this is helpful for someone.