(historical) languages spoken by the Allied Powers and borrowed words in Japanese that originated from such languages

(linguistics) "role language": unique language usage serving as a marker of social identity in fictional speech

India (the country)

インド洋, 印度洋: the Indian Ocean

Europe (continent)

tribe / family

(taxonomy) a tribe / (chemistry) a group (column in the periodic table)

group, faction, (political) wing, school

faction / group / school

lord, master / main, principal