Primefaces has not fully gone bidirectional because its a process that will take alot of time to do, If you want something to go RTL,
First application level conversion:
<context-param>
<param-name>primefaces.DIR</param-name>
<param-value>RTL</param-value>
</context-param>
if that did not help, then you'll have to do it by hand.You'll need to find the classes of the generated components and convert their float and direction in css, all classes are specified in the Primefaces manual http://primefaces.org/documentation.html.