unfortunately we do not maintain the OCR libraries. This is the only component of PDF-XChange that is not entirely and 100% our code. We use the Tesseract libraries for the OCR : https://en.wikipedia.org/wiki/Tesseract_(software
As such we do not manage the available languages and you would be best to get in touch with them for adding new language support.
One suggestion we have, since you are seeing relatively good results with some of the existing languages, that you enable, in the editor, more than one. That may well give you the best of a number of different languages.
It is also possible to add any of the languages currently listed listed here: https://github.com/tesseract-ocr/tessdata
To make any of those language files usable in the Editor rename the desired file from XXX.traindeddata
, and place it into ”C:\Programe Files\Tracker Software\PDF Editor\PluginsData\OCRLanguages”
You will also need to create a corresponding XML file with name XXX_pxvocr.lng
and the following content:
<?xml version=”1.0" encoding=”utf-8”?>
<language name="UI Name of the Language” prefix=”XXX” version=”1.00"/>
That will give you access to any language Tesserac support.
I hope that helps.