Right-to-left (RTL) Languages Support

Hi everyone. Now i am developing a Roku Channel with Arabic Language. Is there anyway of use Arabic language?

For now i'm using a StringReverse function to convert from ltr to rtl. And using an arabic font for letters shown correctly. It texts are not shown correctly.
For example "Comedy" must be shown as "كوميديا"
But it is shown like that "ك وم ي د يا" Without spaces but shown letter by letter inspite of words (In arabic when letters become to words they must be adjacent).
Note: In Youtube application there isn't this problem. Arabic words are shown correctly.

Thanks a lot.