You can say "palant" or "kretyn".
There is no translation for dork. You can use the word dork.
Polish in Polish is "Polski".
pu-ta-un
あほ A ho
You can say "Je suis un(e) nul(le)" in French to convey the same meaning as "I am a dork."
To say Jonathan in Polish, you would say "Janusz."
"No" in Polish is "Nie".
To say "uncle" in Polish, you would say "wujek."
To say "June" in Polish, you would say "czerwiec."
You can say "the end" in Polish as "koniec."
This is how you say five in Polish: Pięć
this is how you say today in polish: dzisiaj :PPP