"Van egy török lány is a magyar hajóban."

Translation: There is also a Turkish girl on the Hungarian ship.

[vodkac]

So first of all, in a ship sounds like she has been kidnapped therefore its a weird sentence.
Secondly on a ship would be "a hajón"
Also "hajó" can be "boat" and "ship" as well

[vvsey]

It can also be "hajóban", on a smaller vessel, like a sailboat. But "hajón" is definitely more common.

[ACHale1114]

Why not use sincs

[Liggliluff]

Since that means "there is not either", from "sem nem van"

[clairelanc3]

Why no longer "too" for "is"?

[Liggliluff]

Inconsistencies, report it when you find it

[Richard604037]

If the Hungarian says hajóban, does that make IN the ship compulsory?

[clairelanc3]

Boat?