Learn Italian: Il giornale è italiano. - The newspaper is Italian.

Nouns ending in -e can be either masculine or feminine, so you usually have to memorize the gender when you learn the word. Luckily, this sentence gives you clues: the masculine article il and the masculine adjective italiano both prove that giornale is a masculine noun.

How would I make this plural to say "the newspapers"?

Nouns that end in -e in the singular change to -i in the plural, regardless of their gender. So, the masculine singular il giornale (the newspaper) becomes the masculine plural i giornali (the newspapers).

Why does the adjective end in -o (italiano) instead of matching the -e ending of giornale?

Adjectives must agree with the gender and number of the noun, but they do not always copy the noun's exact last letter. Because giornale is a masculine singular noun, we use the regular masculine singular ending for the adjective, which is italiano.

Why does è have an accent mark?

The accent mark shows that è means "is" (from the verb essere, to be). Without the accent mark, the word e simply means "and".