Hai cercato la traduzione di world's best sister da Inglese a Giapponese

you are the world's best gamblers.
貴方は世界一の賭博師だ

and i have a mug that says "world's best boss."
私は"世界最高のボス"の マグカップを持ってる

you know, i make the world's best macaroni and cheese.
あのね 世界一の物を作ってる マカロニとチーズ

we've got some of the world's best teams here in dota.
最強の dota チームが 世界各地から集まっています

look, i'm not the world's best dad, but i would never do that.
不肖の父親だがやらない

and in this place that's called the world's best chocolate shop, there is a japanese employee.
この世界一とも 称される チョコレート店に 何と 日本人の職人さんが いらっしゃるんです｡

well, aren't you the worlds best archaeologists.
お前達は世界最高の 考古学者になれなかったな