Historical clue formulations

• Speaking naturally — 2024-01-03
• Well-versed (in) — 2021-04-07
• Smooth — 2005-01-01
• Well-spoken — 2003-10-29
• Polished, languagewise — 2002-08-14
• Smooth — 1998-10-03
• Linguistically knowledgeable — 1997-10-08
• Smooth-talking — 1994-11-24