Possible Clues:

• French word before deux or nous
• ___ dos aguas (in doubt): Sp.
• -- nous (just between us)
• and 30 across, treat this as confidential in France
• Argentine province ___ Ríos
• ___ nous (just between you and me)
• Between, in Orléans
• ''__ nous'' (confidentially)
• For the tree around the North, see 15 across
• -- nous (in confidence)