In 1861, linguist Manuel Milà i Fontanals split Catalan into two main dialects: Western and Eastern. The most obvious phonetic difference lies in the treatment of unstressed a and e, which have merged to in Eastern dialects, but remain distinct as and in Western dialects. There are a few other differences in pronunciation, verbal morphology, and vocabulary. Western Catalan comprises the two dialects of Northwestern Catalan and Valencian; the Eastern block comprises four dialects: Central Catalan, Balearic, Rossellonese or Northern Catalan, and Alguerese. Each dialect can be further subdivided into several subdialects. There are two spoken standards for the language based on the Eastern and Western dialects respectively:
Valencians are only surpassed in number of Catalan-speakers by Catalans themselves, representing approximately a third of the whole Catalan-speaking population. Therefore, in the context of linguistic conflict, recognition and respect towards the dual standard, as well as the dual Catalan–Valencian denomination, pacifies the tense central–periphery relations between Catalonia and the Valencian community.
Pronunciation
Vowels
Catalan has inherited the typical vowel system of Vulgar Latin, with seven stressed phonemes:, a common feature in Western Romance, except Spanish, Asturian, and Aragonese. Balearic has also instances of stressed. Dialects differ in the different degrees of vowel reduction, and the incidence of the pair. In Eastern Catalan, unstressed vowels reduce to three: ; ; remains distinct. There are a few instances of unreduced, in some words. Alguerese has lowered to, similar to Eastern dialects spoken in the Barcelona metropolitan area. In Majorcan, unstressed vowels reduce to four: follow the Eastern Catalan reduction pattern; however reduce to, with remaining distinct, as in Western Catalan. In Western Catalan, unstressed vowels reduce to five: ; ; remain distinct. This reduction pattern, inherited from Proto-Romance, is also found in Italian and Portuguese. Some Western dialects present further reduction or vowel harmony in some cases. Central, Western, and Balearic differ in the lexical incidence of stressed and. Usually, words with in central Catalan correspond to in Balearic and in Western Catalan. Words with in Balearic almost always have in central and western Catalan as well. As a result, Western Catalan has a much higher incidence of.
Morphology
In verbs, the 1st person present indicative ending is -e, or -o. E.g., parle, tem, sent ; parlo, temo, sento. In verbs, the 1st person present indicative ending is -o, -i or ∅ in all conjugations. E.g., parlo, parl, parli,. In verbs, the inchoative desinences are -isc/-ixo, -ix, -ixen, -isca. In verbs, the inchoative desinences are -eixo, -eix, -eixen, -eixi. In nouns and adjectives, maintenance of of medieval plurals in proparoxytone words. E.g., hòmens 'men', jóvens 'youth'. In nouns and adjectives, loss of of medieval plurals in proparoxytone words. E.g., homes 'men', joves 'youth'.
Vocabulary
Despite its relative lexical unity, the two dialectal blocks of Catalan show some differences in word choices. Any lexical divergence within any of the two groups can be explained as an archaism. Also, usually Central Catalan acts as an innovative element.
