Learn Italian: Le parole italiane sono nuove.

In Italian, feminine words that end in -a in the singular change their ending to -e in the plural. Since la parola (the word) becomes le parole, all the adjectives connected to it also change to end in -e to match: italiane and nuove.

Why is the article Le instead of I?

Le is the plural word for "the" used with feminine nouns. Because parole is feminine and plural, we use Le. The article I is used for masculine plural nouns.

Why does italiane come after parole?

In English we say "Italian words", putting the describing word first. In Italian, descriptive adjectives usually come right after the noun they describe, making it parole italiane (literally "words Italian").

Wait, I learned that sono means "I am". Why does it mean "are" here?

The verb for "to be" is special. The word sono does double duty: it means both "I am" (io sono) and "they are" (loro sono). Here, we are talking about "the words" (they), so sono translates to "are".