Mastering the Comanche trade language means all your research items cost less Coin.
—In-game description

Comanche Trade Language is a technology in Age of Empires III that can be researched at a Trading Post built on a Comanche settlement. Once researched, it reduces the coin cost of all other technologies by 10%.

Strategy[edit | edit source]

Comanche Trade Language is best used with Home City Cards that reduces the coin costs of upgrades or units.

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