One of the questions that came up in the forum of my DELE B2 course these days has to do with something very small, but very important: capital letters and lowercase letters.
And yes, it is completely normal to get confused. Very often, we see certain words capitalized in other languages, especially in English, and then we transfer that logic into Spanish without even noticing. Other times, we think that if a word sounds important, formal, or institutional, it must begin with a capital letter. But that is not how Spanish works.
In Spanish, many words that look “important” are actually written in lowercase.
The good thing is that once you understand the logic behind it, you stop memorizing isolated cases and start writing with much more confidence. And that really shows in the DELE.
Why this matters in the DELE
It may seem like a small detail, but it is not.
In the written exam, formal accuracy matters. This does not mean you need to become obsessed with capitalization, but it does mean you should show that you can write naturally and with a good command of written Spanish.
Also, these mistakes often appear in the very texts where students want to sound more formal, such as letters, emails, or complaints. And that is exactly where it helps to have these rules clear.
1. Jobs, positions, and forms of address
This is one of the most common mistakes.
In Spanish, jobs, positions, and many forms of address are written in lowercase. Even if you are referring to a specific person, the normal form is:
el presidente
la ministra
el director
la profesora
el médico
el rey
For example:
Ayer habló el presidente en televisión.
Mi profesora me recomendó practicar más la expresión escrita.
He enviado una carta al director del centro.
The same happens in formal greetings:
Estimado señor director:
Estimada señora Gómez:
Estimado profesor:
There are two very common doubts here. The first one is thinking that señor, señora, director, or profesor should be capitalized. They should not.
The second one is writing things like Estimado Señor Director. That is not natural in Spanish.
2. Languages are also lowercase
Another group of words that many people capitalize because of English are the names of languages.
In Spanish, we write:
español
inglés
francés
árabe
alemán
For example:
Estoy preparando el examen de español.
Habla inglés y francés.
Quiero mejorar mi nivel de árabe.
The same happens when you talk about a language class or subject:
Tengo clase de español mañana.
3. Days of the week, months, and seasons
These are also written in lowercase, although many students instinctively want to capitalize them.
lunes
martes
enero
abril
verano
otoño
Examples:
El examen es el viernes.
En mayo me presento al DELE B2.
En verano tengo más tiempo para estudiar.
This is especially useful in written tasks, because dates appear all the time in letters, emails, and personal texts.
4. Nationalities and demonyms
This is another very common case.
In Spanish, nationalities are written in lowercase:
español
italiana
mexicano
alemana
colombiano
For example:
Mi profesora es española.
Tengo una compañera italiana que también prepara el DELE.
Muchos estudiantes colombianos se presentan a esta convocatoria.
5. Religions and schools of thought
These are also written in lowercase:
cristianismo
islam
budismo
The same applies to many movements or schools of thought when they are used as common nouns:
capitalismo
socialismo
romanticismo
For example:
Está interesado en el budismo.
En clase hablamos del romanticismo.
6. School subjects and areas of study
This is another area where students often hesitate.
If you are talking about the subject in a general sense, it is written in lowercase:
historia
biología
matemáticas
gramática
For example:
Mañana tengo examen de historia.
Siempre me ha gustado la biología.
Necesito mejorar la gramática para escribir mejor.
Be careful here, because there can be some exceptions when you mean the official name of a subject, a degree, or an institution. But in everyday use, lowercase is the normal choice.
7. Cardinal points
These are normally written in lowercase too:
norte
sur
este
oeste
For example:
Vivo en el norte de España.
El examen se celebra en el sur del país.
They are usually capitalized only when they form part of a proper name.
8. Currencies
Currencies are also written in lowercase:
euro
dólar
peso
For example:
El examen cuesta varios cientos de euros.
He pagado en dólares.
9. Geographical words that look like proper nouns, but are not
Here, the important thing is to distinguish between the generic word and the proper name.
We write:
el río Amazonas
la cordillera de los Andes
el océano Pacífico
Look at the difference. Río, cordillera, and océano are written in lowercase. Amazonas, Andes, and Pacífico are capitalized because they are part of the proper name.
This point helps students understand a general rule in Spanish: not everything that appears next to a proper noun becomes capitalized.
A very typical DELE example
Let’s go back to the forum question, because it is a perfect example.
If you are writing a formal letter, the natural form would be:
Estimado señor director:
It would not be correct to write:
Estimado Señor Director:
Why?
Because señor is a form of address and director is a job or position. In Spanish, both are written in lowercase in this context.
The same applies to:
Estimada señora presidenta:
Estimado profesor:
Estimado señor López:
So when do we use capital letters?
This is the key point: in Spanish, capital letters are not used to make something look more important. They are used because of specific rules.
We use capital letters in cases like these:
At the beginning of a sentence.
In proper nouns: Madrid, Ana, Instituto Cervantes.
In initials and some abbreviations: ONU, Sr., Sra.
In official names of institutions, organizations, courses, or titles when they form part of the complete name.
For example:
Vivo en Sevilla.
Me he inscrito en el Instituto Cervantes.
He hablado con el Sr. Pérez.
Notice something interesting here: we write señor in lowercase, but its abbreviation, Sr., does begin with a capital letter.
How to avoid this mistake
Sometimes it helps to think like this: if the word names a general category and not a proper name, it will probably be lowercase.
Director is a profession.
Español is a language.
Lunes is a day of the week.
Verano is a season.
Presidente is a position.
That is why, in normal circumstances, all of these are written in lowercase.
A tip for the exam
If you have doubts during the DELE, do not make your text more complicated just to sound more formal. Very often, students try so hard to sound elegant that they end up making unnecessary mistakes.
It is better to write something clear, correct, and natural than to fill your text with formulas that are too rigid or artificial.
And this happens a lot with capital letters. Sometimes a student writes Estimado Señor Director because it feels more formal. But in reality, it sounds less natural and it is also less accurate.
The main idea to remember
Many words that often cause confusion are written in lowercase in Spanish:
jobs and positions
languages
days of the week
months
seasons
nationalities
religions
school subjects
cardinal points
currencies
generic geographical terms such as río, océano, or cordillera
Once you get used to seeing them this way, it becomes much easier to write them correctly.
Because writing well is not about adding capital letters by instinct. It is about understanding how Spanish really works.
And that is also part of preparing well for the DELE.
