Obviously a competitor the RichView component and suffering from similar problems.
1: Right to left text does not set the carat to the right until you highlight some text and then press the button.
2: Typing Arabic text has all sorts of issues.
Have you written this editor using Uniscribe.? If you haven't you will encounter lots of problems with foreign languages such as Arabic, Hindi, Thai etc.
Good start but some way to go.
For v1.0 we have not added explicit Right To Left support.
This is something considered for future updates.