My ottoman empire mod has the standard Turkish leaders as well as the base game party support and the eyptian country

its the same problem with arabia

Is your ottoman empire tag the same as the turkish tag?

also, can you give the error log? you can do this by going in properties and typing -debug in the launch options

Code with UTF-8,assign GFX's and open the game in the Debug mode.
Look at the error log and try to find the problem,if you can't - always can send it here.