Source dependent

oat milk is recognized, but its vegan status has not been verified in the local ingredient taxonomy.

Names you may see on a label

ovesné mlékokauramaitobebida de aveiaLait d'avoinelatte d'avenaвівсяне молокоHaferdrinkmleko owsianehavredryckbebida de avenahavredrikhavermelknapój owsianyHafermilch

How to verify it

Look for a vegan certification or a manufacturer statement identifying the original source. The ingredient name alone does not settle it.