"Hledám ji."

Translation: I am looking for her.

[EstaJohnst1]

is not "for" a preposition? I thought we used the ni form after a preposition

[nueby]

You may want to slow down. Why would the English preposition impact the form of the Czech pronoun? And would the Czech prepositional pronoun forms vanish if we were translating from a language without prepositions?