くだけた の訳語→ plain worldly
闇 の訳語→ blackness dark darkness gloom hole shadow
遠慮のない の訳語→ unaffected unstintingly
軽い の訳語→ breezy casual conversational exciting gentle little mild mildly minor neat petit quick slight small soft thrilling
打ち解けた の訳語→ companionable friendly mellow uninhibited
内 の訳語→ inner inside within
裏 の訳語→ back behind bottom source
informally