Uploading licenses using spreadsheet loader

Summary

Is it possible to upload licenses into HCM using spreadsheet loader?

Content

We are working on a project to add Licenses and Certifications into our production environment.  I need to find a way to upload the licenses and certifications as lists of values.  We also wanted to upload the licenses and certification that have been kept track of through spreadsheets.  Does anyone know if we can accomplish this using spreadsheet loader or is FBL the only way?  If we can use spreadsheet loader, can you please share which spreadsheet to use?  Thank you!