“Casual speech” in Japanese
Short answer
Casual speech in Japanese is “タメ口” (tameguchi). Full meaning: casual speech, peer language, informal language.
Other ways to say “Casual speech” in Japanese
友達言葉
tomodachikotoba casual speech
ため口
tameguchi casual speech, peer language, informal language
タメグチ
tameguchi casual speech, peer language, informal language
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