The the R4B release candidate downloads (both XML and JSON flavors), the following examples are invalid:

• medicinalproductdefinition-example
• substancedefinition-example

In each case, there is a language field will a maxBinding of http://hl7.org/fhir/ValueSet/all-languages

This ValueSet has codes from system "urn:ietf:bcp:47".

However, the codings in these examples have the following systems instead:

• http://ema.europa.eu/example/languageCode
• http://example.europa.eu/fhir/Language