Possible Clues:

• Special turn of phrase
• Way of putting things
• "For crying out loud," e.g.
• ''In the doghouse,'' e.g.
• Characteristic language of people or group
• "Eat crow," e.g.
• 'Hang your head,' for instance
• Manner of speaking or writing
• Colorful phrase
• Distinctive tongue having origin of old in northerly part of France