Spanish is a grammatically inflected language, which means that many words are modified ("marked") in small ways, usually at the end, according to their changing functions. Verbs are marked for tense, aspect, mood, person, and number (resulting in up to fifty conjugated forms per verb). Nouns follow a two-gender system and are marked for number. Personal pronouns are inflected for person, number, gender (including a residual neuter), and a very reduced case system; the Spanish pronominal system represents a simplification of the ancestral Latin system.
Spanish was the first of the European vernaculars to have a grammar treatise, Gramática de la lengua castellana, published in 1492 by the Andalusian philologist Antonio de Nebrija and presented to Queen Isabella of Castile at Salamanca.[1]
The Real Academia Española (RAE, Royal Spanish Academy) traditionally dictates the normative rules of the Spanish language, as well as its orthography.
Differences between formal varieties of Peninsular and American Spanish are remarkably few, and someone who has learned the language in one area will generally have no difficulties of communication in the other; however, pronunciation does vary, as well as grammar and vocabulary.
Recently published comprehensive Spanish reference grammars in English include DeBruyne (1996), Butt & Benjamin (2011), and Batchelor & San José (2010).