How do English words change when plural in Italian?

Question

When an English word is used as a singular term in Italian, it is normal to use the English singular form, for example:* un film* un computer* un marine spaziale* un cowboyWhen the words are used as plural terms, we can find different versions:* due film (also due films)* due computer (also due computers)* due marine spaziali (also due marines spaziali)* due cowboy (or cowboys)I think that always using the singular is the correct way, except for the word "marines".What is the grammatically correct declination?

Answer 1

Foreign nouns don't change in the plural. However, verb, article, and any adjective are supposed to be in the plural. Example:

Ho visto un film interessante. - Ho visto due film interessanti.

Il marine è invincibile. - I marine sono invincibili.

Lo sport invernale - Gli sport invernali

Un cowboy va a cavallo. - Due cowboy vanno a cavallo.