Hello,

You can translate the mentioned strings in Loco > Themes > Woodmart. I have checked at my side all the strings are available for the translation.

As for the double adding, please make sure your site runs the recent them version.

Please deactivate all the plugins not related to the theme and check the issue, if the problem remains, leave the plugins not activated and provide the site admin access to the private area we shall check.

Best Regards