When that update set imported onto any same patch level target instance, it does not apply the recent changes recorded on the language field.
Steps to Reproduce
Existing documentation (label) records should never have their table, element, or language values change. These values define the unique name of the record which, once created, should never be altered. Always create a new label instead of modifying the language (or element, or table) of an existing label.
Related Problem: PRB589878