Translation

よくしゃべる / 弁舌さわやかな / 口数の多い

Meaning

Voluble describes someone who speaks a lot, quickly, and easily. It can be neutral, admiring, or mildly critical depending on whether the talk feels fluent or excessive.

Examples

• その弁護士は質問されると流暢に答えました。
  The lawyer became voluble when questioned.
• 彼女はふだん無口ですが、音楽の話になると急によくしゃべります。
  She is quiet until music makes her voluble.