Thank you for pointing this out!
Yes, indeed the label is not localized, I have logged a feature request for our team to introduce this as an out of the box label, you can check the logged request in our portal here:
In the meantime it is possible to add manually a new label under Interface labels&M<essages and use it in the widget template. The only thing you need to take into account is that the newly created label will not be found before you restart the application (as the resources are cached on system initialize). For your convenience I've recorded a short video
showing how I've configured this on my end.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items