So the script doesn't handle Greek unicode well. Apparently, the algorithm that cuts long sentences into pieces doesn't count the length correctly with this content.
Enfin, @ichnilatis the dictionary is added to the usual directory,
here. Be aware, that they configuration files used to create the pocketbook dic-file were the English ones. No configuration files (keyboard-, collates- and morphems.txt-files) for Greek were (ever) configured. Earlier in the thread another Greek dictionary was created, with no obvious problems during testing. Please report back whether it works or fails.
Warning:The free cloud storage I am using is stopping in a few months. So download the dictionaries that you want, because the links will die. If someone would like to host the dictionaries: Please tell me the location and I'll update the hyperlinks in this thread. I have move to pCloud for the dictionaries.