[Essam31]

On second thought, I do not think there is anything is forcing all the subtitles to be in ltr direction because Netflix already has many Arabic subtitles without ‏ and only have the hidden control character "Right to left embedding" in the start of each subtitle line like the movie "1922" and the punctuation marks are displayed at the right positions on Kodi with the Netflix plugin, I think the effect of replacing ‏ with "Right to left embedding" and ‎ with "Left to right embedding" does not occur immediately for some reason, you can test this thought by removing

replace_string(strText, "‏", "\0xE2\0x80\0xAB");
replace_string(strText, "‎", "\0xE2\0x80\0xAA");


and add

replace_string(strText, "\0xE2\0x80\0xAB", "\0xE2\0x80\0xAA");

If the full stop in the Arabic subtitle lines still at the left end of the lines in the movie "1922", then my thought is right.

the problem is in my country i can't do tests (like 1922 or Bright)
most of Arabic streams are not listed in (Kodi) subtitles languages, becouse are not in webvtt type, but in image type

you can move the conversation on github because it's hard for me to follow here 

Thank you so much for all your help, I have no more ideas now for how the problem with RLM could be fixed, you can ask for merging of your PR, at least we got rid of the very annoying ‏ and ‎ and the subtitles now are more readable, thank you again.