Codul PIN este personal.

Because -ul is the Romanian definite article attached to the end of the noun.

• cod = a code
• codul = the code

So Codul PIN means the PIN code.

Romanian usually puts the definite article at the end of the noun.

For example:

• băiat = boy
• băiatul = the boy
• cod = code
• codul = the code

This is a very common feature of Romanian grammar, and it often feels unusual at first to English speakers.

Yes, it is similar to English expressions like PIN number or ATM machine, where part of the meaning is technically repeated.

In everyday Romanian, cod PIN or codul PIN is completely normal and idiomatic. Learners should just treat it as the standard way to say it.

Yes, in everyday Romanian, people may also say PIN-ul, especially in casual or technical contexts.

• PIN-ul este personal. = The PIN is personal.

Both are understandable, but codul PIN is very natural and slightly more explicit.

Este means is. It is the 3rd person singular form of the verb a fi (to be).

So:

• Codul PIN = the PIN code
• este = is
• personal = personal

Together: The PIN code is personal.

No, not in a normal sentence like this. Romanian usually keeps the verb a fi in the present tense.

So you say:

• Codul PIN este personal.

Not:

• Codul PIN personal.

That would sound incomplete in standard Romanian.

Because Romanian has many words of Latin or international origin that look very familiar to English speakers.

Here, personal means personal/private, meant only for one person. In the context of a PIN, it means the PIN belongs to you and should not be shared.

Even though it looks the same as the English word, it is still a normal Romanian adjective.

In this sentence, personal stays the same because it is describing a masculine singular noun phrase: codul PIN.

Romanian adjectives often agree with the noun in gender and number. Here:

• cod is masculine singular
• so personal is also in the masculine singular form

In other contexts, the adjective may change form.

This is the most neutral Romanian word order:

subject + verb + adjective/complement

So:

• Codul PIN = subject
• este = verb
• personal = complement

Romanian can sometimes change word order for emphasis, but this version is the standard and most natural one.

A simple learner-friendly approximation is:

KOH-dool peen EH-steh pehr-soh-NAL

A few notes:

• codul → the o is clear, like in off but shorter
• PIN is usually pronounced like English peen
• este has two clear syllables: es-te
• personal has the stress on the last syllable: persoNAL

It is basically treated as an international abbreviation used in Romanian. That is why you can see it in combinations like:

• cod PIN
• codul PIN
• PIN-ul

Romanian often adapts foreign abbreviations into everyday grammar, including adding the article with a hyphen, as in PIN-ul.

Yes. It is a complete, natural Romanian sentence.

It has:

• a subject: Codul PIN
• a verb: este
• a complement: personal

So it works perfectly well by itself, for example on a bank screen, an instruction page, or a warning notice.