modern man/person

modern language / (especially in reference to Japanese) modern Japanese; Japanese in its current form, spoken since the Meiji era and based on the Tokyo dialect

(fandom slang) in fanwork, placing characters in a modern AU

"Modern kana usage", the method of using kana to write Japanese that has been used after the 1946 (post-war) Japanese national language reform. Unlike its predecessor, it is almost entirely phonetic, reflecting modern language with little ambiguity.

international auxiliary language / world language

(literally) a new world

the New World

the Old World

world war

world peace