Do you have a sample example of a pdf generated by pdftron that can show multi byte characters?
If so, can you please point to me?
With multi byte characters I suppose you mean CJKV Unicode stuff.
In this case did you take a look at UnicodeWrite sample: http://www.pdftron.com/pdfnet/samplecode.html#UnicodeWrite ?
So you would use CreateUnicodeTextRun() in conjunction with a composite font created with Font.CreateCIDTrueTypeFont() or Font.Create(“System font name like Arial Unicode MS on Windows or some type of droid Unicode on Android etc”).