Which civilizations have the Aïr Berbers card?

Ottomans, Portuguese, Italians and Maltese.

What does Aïr Berbers do in AoE3?

Ships 1 Berber Nomad per Trading Post; Ships 1 Berber Nomad per Town Center. The game says: "Ships a Berber Nomad villager for each Trading Post and Town Center you control."

Home City card

Aïr Berbers

Aïr Berbers (tech ID DEHCREVBerberNomads) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 4 civilizations, sent from the Industrial Age. Effect: Ships 1 Berber Nomad per Trading Post; Ships 1 Berber Nomad per Town Center.

Quick answers (3)

Which civilizations have the Aïr Berbers card?: Ottomans, Portuguese, Italians and Maltese.
What does Aïr Berbers do in AoE3?: Ships 1 Berber Nomad per Trading Post; Ships 1 Berber Nomad per Town Center. The game says: "Ships a Berber Nomad villager for each Trading Post and Town Center you control."
What is the tech ID of Aïr Berbers?: DEHCREVBerberNomads.

Ships a Berber Nomad villager for each Trading Post and Town Center you control.

What it does

Ships 1 Berber Nomad per Trading Post(unit)
Ships 1 Berber Nomad per Town Center(unit)

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

In these decks

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