Old Spanish language
Old Spanish, also known as Old Castilian (Spanish: castellano antiguo) or Mediaeval Spanish (Spanish: español medieval), is an early form of the Spanish language that was spoken on the Iberian Peninsula from the tenth century until roughly the beginning of the fifteenth century, before a consonantal readjustment gave rise to the evolution of modern Spanish. The epic poem Cantar de Mio Cid (The Poem of the Cid), published around 1200, remains the best-known and most extensive work of literature in Old Spanish.
Phonetics and phonology 
The phonological system of Old Spanish was quite similar to that of other mediaeval Romance languages. Amongst the consonants, there were three pairs of sibilants, each pair consisting of one voiceless and one voiced member:
- Voiceless alveolar affricate /ts/: represented by the letter ⟨ç⟩ before ⟨a⟩, ⟨o⟩, ⟨u⟩, and by ⟨c⟩ before ⟨e⟩ or ⟨i⟩
- Voiced alveolar affricate /dz/: represented by the letter ⟨z⟩
- Voiceless apicoalveolar fricative /s̺/: represented by ⟨s⟩ in word-initial and word-final positions and before and after a consonant, and by ⟨ss⟩ between vowels
- Voiced apicoalveolar fricative /z/: represented by the letter ⟨s⟩ between vowels and before voiced consonants
- Voiceless postalveolar fricative /ʃ/: represented by the letter ⟨x⟩ (pronounced like the English digraph ⟨sh⟩)
- Voiced postalveolar fricative /ʒ/: represented by the letter ⟨j⟩, and (often) by ⟨g⟩ before ⟨e⟩ or ⟨i⟩ (spelled in the English digraph ⟨si⟩ as in "vision")
The Modern Spanish sound [x] (voiceless velar fricative), corresponding to the letter ⟨j⟩ or to ⟨g⟩ before ⟨e⟩ or ⟨i⟩, and the Modern Spanish sound [θ] (voiceless dental fricative), written as ⟨z⟩ or as ⟨c⟩ before ⟨e⟩ or ⟨i⟩, did not exist in Old Spanish. Modern Spanish [x] and [θ] (which are pronounced [h] and [s], respectively, in Modern Andalusian, Canarian, and Latin American Spanish (especially Caribbean Spanish for [h] sound)) evolved from [ʃ]~[ʒ] and [ts]~[dz] respectively. The Old Spanish spelling of the sibilants was identical to modern Portuguese spelling, which still reflects the mediaeval language; Spanish was respelt in 1815. Old Spanish [z], spelled by the letter ⟨s⟩ between vowels, is only found in Modern Spanish as an allophone of /s/ before voiced consonants.
- xefe (modern Spanish jefe, cf. Portuguese chefe)
- Xeres (modern Spanish Jerez, cf. Portuguese Xerez)
- oxalá (modern Spanish ojalá, cf. Portuguese oxalá)
- dexar (modern Spanish dejar, cf. Portuguese deixar)
- fazer or facer (modern Spanish hacer, cf. Portuguese fazer)
- dezir (modern Spanish decir, cf. Portuguese dizer)
- lança (modern Spanish lanza, cf. Portuguese lança)
- passar (modern Spanish pasar, cf. Portuguese passar)
- foces "sickles", fozes "throats/ravines" (modern Spanish hoces in both cases, cf. Portuguese foices, fozes)
- coxo "lame", cojo "I seize" (modern Spanish cojo in both cases, cf. Portuguese coxo, colho)
- osso "bear", oso "I dare" (modern Spanish oso in both cases, cf. Portuguese urso, ouso)
The letters ⟨b⟩ and ⟨v⟩ were still distinct; ⟨b⟩ still represented a stop consonant [b] in all positions, while ⟨v⟩ was pronounced as a voiced bilabial or labiodental fricative. The use of ⟨b⟩ and ⟨v⟩ in Old Spanish largely corresponded to their use in modern Portuguese, which still distinguishes the two sounds (with the exception of Galician and some northern Portuguese dialects). When Spanish spelling was changed in 1815, words with ⟨b⟩ and ⟨v⟩ were respelt etymologically in order to match Latin spelling whenever possible.
- aver (Modern Spanish haber, cf. Latin habēre, Portuguese haver)
- caber (Modern Spanish caber, cf. Latin capere, Portuguese caber)
- bever (Modern Spanish beber, cf. Latin bibere; Portuguese beber < older bever)
- bivir/vivir (Modern Spanish vivir, cf. Latin vīvere, Portuguese viver)
- amava (Modern Spanish amaba, cf. Latin amābam/amābat, Portuguese amava)
The letter ⟨f⟩ represented variously a labiodental [f], bilabial [ɸ], or glottal fricative [h] (like the English ⟨h⟩) that later disappeared from pronunciation (/h/ is completely silent in Vulgar Latin), where now an orthographic ⟨h⟩ represents it, except learned words (i.e. words borrowed directly from Classical Latin), before a glide, or another consonant.
- fablar (Modern Spanish hablar)
- fazer or facer (Modern Spanish hacer)
- fijo (Modern Spanish hijo)
- foces "sickles", fozes "throats/ravines" (Modern Spanish hoces)
- follín (Modern Spanish hollín)
- ferir (Modern Spanish herir)
- falso (Modern Spanish falso)
- fama (Modern Spanish fama)
- forma (Modern Spanish forma)
- fiel (Modern Spanish fiel)
- fuerte (Modern Spanish fuerte)
- flor (Modern Spanish flor)
This is the reason why there are modern spelling variants Fernando and Hernando (both Spanish of "Ferdinand"), ferrero and herrero (both Spanish of "smith"), fierro and hierro (both Spanish of "iron"), and fondo and hondo (both Spanish of "deep", but fondo means "depth" while hondo means "deep"); hacer (Spanish of "to make") is the root word of satisfacer (Spanish of "to satisfy"), and hecho ("made") is the root word of satisfecho (Spanish of "satisfied").
Morphology and syntax 
In Old Spanish perfect constructions of movement verbs, such as ir (to go) and venir (to come), were formed using the auxiliary verb ser (to be), as in modern Italian and French. For example, Las mugieres son llegadas a Castiella (Las mujeres han llegado a Castilla).
Possession was expressed by the verb aver (haber). Example: Pedro ha dos fijas (Pedro tiene dos hijas).
In the perfect tenses, the past participle often agreed with the gender and number of the direct object. Example: María ha cantadas dos canciones (María ha cantado dos canciones), yet this was inconsistent even in the earliest texts.
The future and conditional sentences were not grammaticalised fully as inflexions, i.e., the verb aver still was analysed as an auxiliary rather than as a synthetic suffix, and still received stress until the seventeenth century. Pronouns, therefore, following general placement rules, could be inserted between the main verb and the auxiliary in the future or conditional tense. Compare this phenomenon with modern Portuguese (mesoclisis):
- E dixo: "Tornar-m-é a Jherusalem." (Fazienda de Ultra Mar, 194)
- Y dijo: "Regresaré a Jerusalén." (modern equivalent)
- And he said: "I will return to Jerusalem." (English translation)
- En pennar gelo he por lo que fuere guisado (Cantar de mio Cid, 92)
- Se lo empeñaré por lo que sea razonable (modern equivalent)
- I will pawn it to them for whatever is reasonable (English translation)
If there were a word with stress before the verb empeñar, the pronouns would go before the verb: non gelo empeñar he por lo que fuere guisado.
Generally, an unstressed pronoun and a verb in simple sentences combined into one word.[clarification needed] In a compound sentence, the pronoun was found in the beginning of the clause. Example: la manol va besar = la mano le va a besar.
In comparison with the modern language, the future subjunctive was living (nowadays it may be found only in legal or solemn discourse, and in the spoken language in some dialects particularly in areas of Venezuela replacing the imperfect subjunctive). It was used similarly to its modern Portuguese counterpart, in place of the modern present subjunctive in a subordinate clause after si, cuando, etc., when an event in the future is referenced.
- Si uos assi lo fizieredes e la uentura me fuere complida
- Mando al uuestro altar buenas donas e Ricas (Cantar de mio Cid, 223-224)
- Si vosotros así hacéis y la suerte me favorece,
- Mando a vuestro altar ofrendas buenas y ricas (modern equivalent)
- If you do so and fortune is favourable toward me,
- I will send to your altar fine and rich offerings (English translation)
|Latin||Old Spanish||Modern Spanish|
|acceptare, captare, effectum, respectum||acetar, catar, efeto, respeto||aceptar, captar, efecto, respecto and respeto|
|et, non, nos, hic||e, et; non, no; nós; í||y, e; no; nosotros; ahí|
|stabat; habui, habebat; facere, fecisti||estava; ove, avié; far/fer/fazer, fezist(e)/fizist(e)||estaba; hube, había; hacer, hiciste|
|hominem, mulier, infantem||omne/omre/ombre, mugier/muger, ifante||hombre, mujer, infante|
|cras, mane (maneana); numquam||cras, man, mañana; nunqua/nunquas||mañana, nunca|
|quando, quid, qui (quem), quo modo||quando, que, qui, commo/cuemo||cuando, que, quien, como|
Sample text 
The following is a sample from Cantar de Mio Cid (lines 330–365), with abbreviations solved, punctuation (the original has none), and some modernized letters. A recording with reconstructed mediaeval pronunciation can be accessed to here, reconstructed according to period phonetics (by Jabier Elorrieta). Below, the original Old Spanish text in the first column is presented, along with the same sample in modern Spanish in the second column.
See also 
- A History of the Spanish Language. Ralph Penny. Cambridge University Press. Pag. 210.
- Diccionario de dudas y dificultades de la lengua española. Seco, Manuel. Espasa-Calpe. 2002. Pp. 222-3.