What does Cantinas do in AoE3?

Removes: Outlaw Pop Reduction; Gives: Saloon Ronin. The game says: "Upgrades Saloons to Cantinas, which have Ronin, and outlaw-type units cost less pop."

Home City card

Cantinas

Cantinas (tech ID DEHCCantinas) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Industrial Age. Effect: Removes: Outlaw Pop Reduction; Gives: Saloon Ronin.

Quick answers (3)

Which civilizations have the Cantinas card?: Mexicans.
What does Cantinas do in AoE3?: Removes: Outlaw Pop Reduction; Gives: Saloon Ronin. The game says: "Upgrades Saloons to Cantinas, which have Ronin, and outlaw-type units cost less pop."
What is the tech ID of Cantinas?: DEHCCantinas.

Upgrades Saloons to Cantinas, which have Ronin, and outlaw-type units cost less pop.

What it does

Removes: Outlaw Pop Reduction
Gives: Saloon Ronin

Cost: 1
Sent from: IV
Times it can be sent: 1
Game ID: DEHCCantinas

In these decks

MexicansIV×1

Source: techtreey.xml and the Home City files, AoE3: DE 100.19.18309 (build 25040513).