RADCORE has no issue with RTL, because every thing is ready for you to start your project, you will be able to use translation in the version 3.0.0.48 , you can edit some lines in CSS and every thing is ok. this is my project in RADCORE UniGUI:https://1drv.ms/u/s!AtMP1Wb4ARGBhGQkSLWHFJ-hY-CL?e=9dBm2w