Blackjack in the United States is basically a silent game.That is, you rarely have to say anything to the dealer.If you need a hit,you either point at your cards or tap the felt with your index finger, and if you want to stand, you wave your hand over the cards.In a face up game,never touch any cards.
If you want to split or double down , place another best alonside your initial bet.Most of the time, the dealer will know exactly which action you want to take.If she isn’t sure,she will ask you.
About the only time you have to say anything is when you want to surrender.Simply say “surrender” when it is your turn.
Most European countries don’t recognize hand signals in their blackjack games.Before you sit down at a table, it is best to hang around for a while until you learn the foreign terminology for hitting,standing,splitting and doubling.