English to Polish Law/Patents Law (general) US Constitution

In translations of the US Constitution, the "letter of marque and reprisal" gets translated into "list kaperski".

https://en.wikipedia.org/wiki/Letter_of_marque
https://pl.wikipedia.org/wiki/List_kaperski

The matter is the Polish "kaper" could keep the loot or spoils,

Wikipedia: ... "prawo do zachowania większości zysków."

"wystawiać listy kaperskie i wydawać przepisy dotyczące PRAWA DO ŁUPU na lądzie i wodach;"
http://libr.sejm.gov.pl/tek01/txt/konst/usa.html

"wystawiać listy kaperskie, oraz stanowić W SPRAWACH ŁUPU na morzu i lądzie; "
http://www.kolousa.wssm.edu.pl/res/konstytucja.pdf

American letters of marque did not allow looting the captured. Here is one by president James Madison,
http://www.constitution.org/mil/lmr/1812amer2.htm

"to subdue, seize and take any armed or unarmed British vessel, public or private, which shall be found within the jurisdictional limits of the United States or elsewhere on the high seas, or within the waters of the British dominions, and such captured vessel, with her apparel, guns and appurtenances, and the goods and effects which shall be found on board the same, together with the British persons and others who shall be acting on board, TO BRING WITHIN SOME PORT OF THE UNITED STATES;"


In Poland, there were fraybiters:

Frejbiter, frajbiter
http://www.spxvi.edu.pl/indeks/haslo/52112#znaczenie-2

Instytut Badań Literackich Polskiej Akademii Nauk
Słownik Polszczyzny XVI wieku

Polish ports were considered for a condition to employ fraybiters for own protection, without any looting in the context:

[miasta portowe] "Ná których gdyby były ułożoné condycie, áby pewnych czásów winni byli po kilku okrętów wedle proporciéy ná morze, z Armatą, y ADMIRAŁEM KORONNYM z Fráybiterámi, ku utwiérdzeniu maris dominium Polskiego y Litewskiego."

I would be grateful for comments, as well as probably a more adequate translation of the "letter of marque and reprisal".