Hi,
This warning is related to additional Verse path validation for assets, as a hyphen is not valid to use in Verse paths. We do support using an underscore as an alternative for localized assets, however the in-editor tooling has not yet been updated to prefer using this form.
For now you would need to manually rename the folder to use an underscore, eg, rename pt-BR to pt_BR.
If you get an error starting with “The L10N folder is reserved…” then you may need to toggle “Localized Content” off and on again in your Content Browser view settings.
Thanks.