La cessione dei diritti include il diritto d'autore.

Cessione is a noun from the verb cedere, meaning to transfer, to assign, or to give up.
In this sentence, it has a legal or contractual sense: transfer/assignment of rights.

So la cessione dei diritti is something like:

• the transfer of rights
• the assignment of rights

It sounds more formal than everyday speech.

Italian uses articles much more often than English.
So where English might say transfer of rights, Italian normally says la cessione dei diritti.

Here la is the feminine singular definite article because cessione is a feminine singular noun.

Without the article, cessione might sound more like a heading, a label, or very compressed legal style.

Dei is a contraction of di + i.

• di = of
• i = the for masculine plural nouns

So:

• dei diritti = of the rights

Also:

• diritto = right
• diritti = rights

Literally, la cessione dei diritti means the transfer of the rights, though in natural English this is often just transfer of rights.

Include is the third-person singular present indicative of includere.

The subject is la cessione, which is singular, so the verb is singular too:

• la cessione include = the transfer includes

Compare:

• la cessione include = singular
• le cessioni includono = plural

Even though diritti is plural, it is not the subject. The subject is la cessione.

Yes, the meaning is very close.
Italian include means includes.

But remember:

• it is an Italian verb form, not an English word inside the sentence
• the pronunciation is Italian, not English

It is pronounced roughly in-KLOO-deh, not like English includes.

Because diritto d'autore is a fixed expression meaning copyright.

So even though diritti earlier is plural, il diritto d'autore can still be singular because it names one legal concept.

A useful distinction is:

• diritto d'autore = copyright as a legal concept/system
• diritti d'autore = author's rights / copyright rights in the plural, depending on context

In this sentence, the singular sounds natural because it refers to copyright as one included right or legal category.

The apostrophe shows elision: a vowel has been dropped.

Here:

• di autore becomes d'autore

This is common in Italian before a word beginning with a vowel.

Important: this is not like the English possessive apostrophe.
It simply shows that di has shortened to d'.

Because diritto d'autore is the standard fixed expression for copyright.

• diritto d'autore = copyright
• diritto dell'autore would mean something more literal like the right of the author or the author's right

So d'autore is not random here; it is part of the established legal term.

Again, Italian normally uses articles where English often does not.

English may say:

• copyright
• the transfer includes copyright

Italian prefers:

• il diritto d'autore

So il is there because diritto is a masculine singular noun, and in a normal sentence Italian usually needs the article.

Yes. It sounds clearly formal, legal, or contract-related.

Words like:

• cessione
• diritti
• diritto d'autore

are very common in contracts, publishing, licensing, and intellectual-property contexts.

In more casual conversation, people might still understand it perfectly, but the tone is definitely not conversational.