Pronouns:
I = sa
You = pa
He = ka
She = va
They (singular) = ta
It = ya
We (not including you) = stu
We (including you) = spu
You (plural) = pu
They (plural, people) = tu
They (plural, objects) = yu
I suppose, logically, that would leave room for more, optional pronouns. If you notice the pattern, I guess it would also leave room for sta, sya, sva, vu, and ku, if you can guess what those mean :)