I am confused. Here is the correct translation for verengnanpu' Ferengi. Compared to the verengnanpu' Duj, it should be Ferengi's.... I am really confused
Please note that the correct Klingon pronunciation ("spelling") of the word is verengan. Don't add an extra n in there.
The plural of "Ferengi" is "Ferengi" -- "one Ferengi, two Ferengi", like "one sheep, two sheep".
"the Ferengi's ship" has a possessive 's as in "the sheep's meadow" (= the meadow belonging to all of the sheep), not a plural -s.