“Ancient language” in Japanese
Short answer
Ancient language in Japanese is “上代語” (joudaigo). Full meaning: ancient language, ancient word; Old Japanese.
Other ways to say “Ancient language” in Japanese
古言
kogen old saying, old expression; old language, ancient language, archaic word
古語
kogo archaic word, obsolete word, archaism; old saying, old adage; old language, ancient language
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