Natural language cannot be determined

PAC 2 Error

Natural language of [X] cannot be determined

(Note: [X] could be expansion text, text object, actual text, alternative text, an alternate name of a form field, an outline item, or Contents entries in annotations.)


PDF/UA > Basic Requirements > Natural Language of [X]

Failure Condition

Matterhorn Protocol Checkpoint 11-001 through 11-006. Example:

Checkpoint 11-001: Natural language for text in page content cannot be determined.


In Acrobat Pro, File > Properties > Advanced tab > Under “Reading Order” click the down arrow in the Language field and select the appropriate primary language for the document.

Example PDF with this error

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