Hello,
I have checked the header builder options and don’t see the problem http://recordit.co/rYhCRC9uqQ
Could you, please, explain the issue in more detail and provide a video of the problem for better understanding? You can use Recorit tool to create and share video.
To translate theme and XStore core plugin use the Loco Translate plugin https://xstore.helpscoutdocs.com/article/30-base-theme-translation
Regards