Swedish football
...that the rules of Swedish football played in the late 19th century were a mix of association football rules and the rugby football rules because of a misunderstanding?
...that the rules of <b id="mwXQ"><a href="./Swedish_football_(code)" id="mwXg" rel="mw:WikiLink" title="Swedish football (code)">Swedish football</a></b> played in the late <a href="./19th_century" id="mwXw" rel="mw:WikiLink" title="19th century">19th century</a> were a mix of <a class="mw-disambig" href="./Laws_of_the_Game" id="mwYA" rel="mw:WikiLink" title="Laws of the Game">association football rules</a> and the <a href="./Rugby_football" id="mwYQ" rel="mw:WikiLink" title="Rugby football">rugby football rules</a> because of a misunderstanding?