Hi Rodrigo,
Since the manifest name of the C# is distinct from the VB project, it cannot able to fetch the information from the resource file.
We have confirmed this is a defect. So, we have logged the bug report for this issue "Sample level localization is not working on the VB project" and it will be available on our upcoming release 2018 Volume2 SP2 which will be expected on end of August.
Regards,
Adhi