Hello,

I encountered this problem with RTL languages. Hebrew is reversed if past in LineEdit or EditString, while Arabic is past correctly but when selected a reversed selection is overlapping the non selected text.

To reproduce this behavior, just copy and past some Arabic/Hebrew text in TheIde and try to select the Arabic text.

Samples:
"هذا مثال نصي للغة العربية"
"זוהי דוגמה טקסט לעברית"

I took a look at CodeEditor's code trying to figure out a fix for at least the weird selection, but i soon give up.. still learning C++ let alone U++. But i can definitely help with testing Arabic though.
By the way, RichText displays Arabic and Hebrew perfectly,

By the way, RichText displays Arabic and Hebrew perfectly,..

That is actually sort of surprising. On what system are you?

Unfortunately, left-to-right was fixed into U++ internals at the beggining (which is now 20 years ago) and nobody had guts to fix that ever since. There will be a lot of changes before we are there. But I am willing to give it a try!