Footer changing

Hello, is it legal to change a footer?
I want to translate it, but i dont want to break the license terms.
After changes footer would be like:

Hello there,

Basically you could do that as Astrid is GPLv2 licensed. However, we always appreciate our users site’s footer credits to stay as it is to show their support for our hard works.

Regards,
Kharis
aThemes Support