¿Cómo se dice en inglés? "Alguien quiere un helado"
conversando con amigos,como les digo en ingles, alguien quiere un ace creem
¿Alguien quiere un helado? - Does anyone want ice cream?
Alguien quiere un helado - Someone wants an ice cream.
If it was at home after dinner one would most likely say "anyone want ice cream'? because there is probably no choice or different ice cream , but if you were out with friends it would be , " anyone want an ice cream" then you have multiple choices. And the "an ice cream " refers to one of any type you desire.
Does anyone want ice cream?
In UK/Irish usage at least, assuming it's a question, a less grammatically correct, but more colloquial, option would be:
"Anyone for an ice-cream?
There is also: "Anyone fancy an ice-cream?"
In an informal situation we would also be just as likely to say:
"Who wants (an) icecream?"