Spanish: language resources

The Library and Language Service have joined forces to select a series of resources for Spanish. This dossier includes reference works and tools to help resolve doubts on spelling, grammar or vocabulary. You can also find resources to help with pronunciation or to keep up-to-date with the news and new developments in the use of Spanish.

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The Language Service

Lengua y estilo de la UOC
This site, run by staff at the Language Service, provides specific guidelines for UOC-related texts in Spanish.
Guía práctica de español
This guide covers use of Spanish at the UOC, including spelling, morphology, syntax.


This section has a selection of lexicographic reference works.

Diccionario de la Real Academia Española
The dictionary of reference for Spanish, it is the result of collaboration between all of the language's academies.
Diccionarios de la Real Academia Española
A selection of dictionaries published by the Royal Spanish Academy. It includes Spanish language dictionaries.
A reverse or ideological dictionary that lets you search for words by concept.
Acronym Finder
Abbreviations dictionary providing the definitions of acronyms, initialisms and other shortened forms.
A dictionary of synonyms.
Diccionario de sinónimos online
Online thesaurus for Spanish synonyms, with search results subclassified according to main meanings.
A tool to find the definitions of terms and their antonyms.
Diccionario de americanismos
A dictionary with specific terms used in Latin American Spanish.
Dictionary of Chilean Spanish
A specific dictionary of Chilean lexis and idioms.
Diccionario de mexicanismos
A dictionary of Mexican expressions from the Mexican Academy of Language.
Diccionario del español de México
A specific Mexican lexical dictionary from the Mexican Academy of Language.
Diccionario breve de colombianismos
A specific Colombian lexical dictionary from the Colombian Academy of Language


Bilingual and multilingual dictionaries and databases to help with translations.

A tool to find the word selected and offer its definition, synonyms & antonyms or translation into other languages.
Inter-Active Terminology for Europe (IATE)
The EU's inter-institutional terminology database.
A search engine with which you can search billions of bilingual texts for words and expressions.
Oxford Dictionaries (Spanish-English)
The English-Spanish dictionary offered by

Grammar questions and doubts

This section has resources to resolve all kinds of doubts about language and grammar.

Diccionario_ panhispanico_dudas
It offers academic responses to common doubts about the Spanish language.
Its aim is to promote correct use of Spanish in the media.
A participative portal for sharing practical information on Spanish norms, use and style.
A portal to resolve doubts on punctuation and accents, grammar, style, format and composition.
A portal from the Cervantes Institute, which supports and disseminates the Spanish language throughout the world.
Gramática històrica del castellano
Content focusing on historical linguistics, explaining the evolution of Spanish language.


These resources can help resolve any possible doubts relating to the conjunction of verbs

A website for conjugating over 12,000 verbs; it also offers synonyms for each verb.
A conjugator offering information on the morphological characteristics of verbs and their irregularities.
Diccionario de la Real Academia Española
The dictionary of reference for Spanish, it is the result of collaboration between all of the language's academies.


This section has databases with large numbers of words and the contexts in which they appear.

A historical corpus with over 100 million words from texts from the 13th to the 20th century.
CORPES (Corpus del Español del siglo XXI)
A search engine for finding Spanish words used between the years 2001 and 2012.
A search engine to find the Spanish words currently used in the written media.
A search engine for Spanish words used throughout history.
Google Books Ngram Viewer
An online search engine that charts the frequencies of search strings within a corpus.


A selection of Spanish sayings, with their corresponding translations.
Lenguaje administrativo español
Selection of language resources for use as study sources about Spanish administrative language.


This section offers tools to find out how to pronounce words in different languages.

The place where you can find millions of words pronounced in their original language.

Keeping up-to-date

This section has a selection of websites and blogs with news and new developments from the world of languages.

A blog with a large of number of dictionaries and general reflections on language.
A blog from the Humanities Department at the Pontifical Catholic University of Peru.

A variety of applications including a spell checker, a voseo corrector (for a 2nd person form used in parts of Lati
Convertidor de números a texto español - Números TIP
Application that translates numbers into their written forms, in Spanish, English, Italian and German.
Paramtext - Parametrizador Morfológico de Textos
This text analysis application tells you the numbers of characters, words, sentences and paragraphs in a file.