hi,
If your override language doesn't include any translation, then the rule from the "en-GB" will be used as a "placeholder". Either translate it manually from en-GB file, or create a new rule on your override language file and translate it by yourself.
I have some good news about the VM3 + J3 version of SportMart (SportMart v3.0). It is coming very soon. The development has been completed, it is in the testing and optimization process. I know, the release was delayed couple times in the past but it won't happen this time. It is comming. We were picky to release the new version because wanted SportMart v3.0 to be perfect and bug-free.
We will send a newsletter to all SportMart buyers when the new version is officially available.
Regards.
Support