PDF: Check embedded letters.
What does it show?
Description of PDF fonts can be found in the PDF.
How to interpret the result?
Shows the list of non-embedded fonts.
What does the warning mean?
If the font description is not in the PDF, foreign characters may be substituted for the original text when printed.
How the problem could be resolved?
Unfortunately, the problem can be corrected only on a machine in which the missing font type is available.