OCR Processing Issues with Thai language

[Chaowwat22493709kmph]

OCR Processing Issues with Thai language.

I'm follow this medium url to get the OCR Processing convert PDF to searchable by using MS Automate
https://medium.com/adobetech/make-pdfs-searchable-ocr-after-importing-into-sharepoint-1a8037744841

OCR Processing have issues with Thai language , it can split the word but the value is not correct for example the word “กรรมการ” the result of this text is “f1jjlJf11j” 

Do i have to do some extra config or maybe i missed something? or it's just a Adobe PDF Services Connector not support Thai language