Thanks for your comment!
If you would like to create your own character set, details are listed below. However, I have only been able to create the document in Japanese yet, so I will make time to make it into English in the next month or so.
Creation of original character set
The program to create the configuration file can be used in English, but the output of the configuration file contains some Japanese, so this will also be updated next month. However, it is not an element that causes operational problems, so it can be used as it is now.