If we say:

{tlhInganpu' romuluSnganpu' chevchuqmoH qeylIS}

Then does this mean that "kahless separates the klingons from the romulans" ?

Or does it mean that:

"There is a group of klingons and romulans, kahless takes this group,
and causes each member (regardless whether he's a klingon or romulan),
to separate the other member (regardless whether he's a klingon or
romulan)" ?

And don't axe me, what "causes each member to separate the other"
actually means, because I don't know.

I don't think the sentence is meaningful. -chuq means the subject is plural and does the verb to each other. It doesn't work for the object.

tlhInganpu' romuluSnganpu' je chev qeylIS
Kahless separates the Klingons and the Romulans.

-- 
SuStel
http://trimboli.name