I an not interested in this, know nothing about this topic. Just Google.
I think you may convert the format to json, then try to work on the json file.
The yomichan dictionary processor on github will unpack an epwing to a zipped json.
Or you can just download one of the pre-processed json files people have already made for yomichan.
The only issue is that epwings have a limited character set so obscure kanji come out as bitmaps and you have to run that through OCR.
Reddit - Dive into anything
A JSON file is simply a text file that uses JSON formatting. These files are used to store structured data and are identified by their “. json” extension.