These success criteria would make a web page with multiple language versions compliant, with only one version being conformant and the others being inaccessible. We need to exempt alternative language versions from this success criterion. This should be mentioned and the definition of "alternate version(s)" should be amended correspondingly.
Essence: An accessible page in Korean is not an equivalent alternative for an inaccessable page in Urdu.
Add to 4.2.1 and 4.2.3: "This does not apply to alternate versions serving different languages."
Also, change the definition of "alternate version(s)" to exclude versions serving different languages, e.g.: "version that provides all of the same information and functionality in the same natural language and is as up to date as any non-conformant content".
We have revised the definition of "alternate version" to clarify that the versions must use the same natural language. In reworking the conformance section, we have also added:
If multiple language versions can be negotiated, then conformant versions are required for each language offered."