La cartilla sanitaria menciona el microchip.

In this sentence, la cartilla sanitaria most naturally means a health booklet / medical record booklet, especially the kind used for a pet. Because the sentence mentions el microchip, the context is very likely an animal’s health booklet rather than a person’s.

In Spain, people often use cartilla for a small official booklet or record.

Because Spanish nouns have grammatical gender.

• cartilla is feminine, so it takes la
• microchip is masculine, so it takes el

This does not mean the objects are biologically female or male. It is just part of how Spanish grammar works.

In Spanish, descriptive adjectives usually come after the noun.

So:

• cartilla sanitaria = health booklet
• literally, something like booklet health-related

Also, sanitaria agrees with cartilla:

• cartilla is feminine singular
• so the adjective must also be feminine singular: sanitaria

Not exactly. This is a useful false-friend warning.

In Spanish, sanitario/sanitaria often means:

• medical
• health-related
• healthcare-related

So cartilla sanitaria is not really a sanitary booklet in the English sense. It is a health/medical booklet.

Menciona is the third-person singular present indicative form of mencionar.

So it means:

• mentions

Here, the subject is la cartilla sanitaria, which is singular, so the verb is singular too:

• La cartilla sanitaria menciona...
• The health booklet mentions...

Because Spanish usually does not need subject pronouns when the subject is already clear.

Here, the subject is explicitly stated:

• La cartilla sanitaria

So adding ella would be unnecessary and unnatural in normal Spanish.

Spanish often uses the definite article where English may or may not use one.

Here, el microchip suggests a specific microchip already associated with the animal or already understood from context.

So the sentence is talking about the microchip, not just microchips in general.

Yes, microchip is commonly used in Spanish. It is a borrowed word, but it is very normal.

People may also say simply:

• chip

In pet-related contexts in Spain, both are understandable, but microchip is very common and clear.

Because the personal a is mainly used with direct objects that are people, and sometimes pets when they are treated very personally.

Here, el microchip is a thing, not a person, so there is no a:

• menciona el microchip

That is completely normal.

Yes. Spanish allows some flexibility.

For example, you could also say:

• La cartilla sanitaria menciona el microchip.
• En la cartilla sanitaria se menciona el microchip.

The original version is a straightforward sentence with the booklet as the subject. A different structure might sound more impersonal or more focused on the document itself.

In most of Spain, ll is pronounced similarly to the y sound in English yes, though exact pronunciation varies by region.

A rough guide:

• cartilla ≈ kar-TEE-ya
• sanitaria ≈ sa-nee-TA-rya
• menciona ≈ men-THYO-na in much of Spain, because ci is often pronounced with the th sound of think
• microchip ≈ mee-kro-CHEEP

That said, accents vary across Spain.

Sometimes, depending on context.

The core meaning of mencionar is to mention. But in a document, English might sometimes prefer:

• mentions
• states
• refers to
• lists

Still, grammatically, menciona itself means mentions.

It follows a very common Spanish pattern:

Subject + Verb + Direct Object

• La cartilla sanitaria = subject
• menciona = verb
• el microchip = direct object

So it is a very standard, simple sentence structure for learners to notice.