: The PDF viewer or the generating library does not have access to a font that contains Khmer glyphs.

If your query refers to the scientific software named khmer , it is a high-performance library for .

: To verify a PDF's integrity (making it "verified"), you can use libraries like pyHanko or endesive to add digital signatures . These signatures ensure that the document has not been altered after generation. 3. The khmer Software Package (Bioinformatics)

: Currently the best choice for Python users. It has built-in support for Unicode and text shaping via uharfbuzz .