Several attempts have been made to classify Romance languages. The subgroups created can be posited as intermediate entities in diachrony between a mother language and daughter languages. This diachronic perspective can be structured using a rigid model, such as that of the family tree, or more flexible ones. In general, this perspective yields a bipartite division between Western Romance languages (Ibero-Romance, Gallo-Romance, Alpine-, and Cisalpine-Romance) and Eastern Romance languages (Italian and Romanian), or a tripartite split between Sardinian, Romanian, and other languages. The subgroups can, however, be considered synchronic groupings based on the analysis of the characteristics internal to the varieties. Naturally, the groupings change depending on which features are used and which theoretic model is adopted. Still, this type of approach signals the individuality of French and Romanian with respect to the Romània continua, or contrasts northern and southern Romània, highlighting, on the one hand, the shared features in Gallo-Romance and Gallo-Italian and, on the other, those common to Ibero-Romance, southern Italian, and Sardinian. The task of classifying Romance languages includes thorny issues such as distinguishing between synchrony and diachrony, language and dialect, and monothetic and polythetic classification. Moreover, ideological and political matters often complicate the theme of classification. Many problems stand as yet unresolved, and they will probably remain unresolvable.
Cognitive semantics (CS) is an approach to the study of linguistic meaning. It is based on the assumption that the human linguistic capacity is part of our cognitive abilities, and that language in general and meaning in particular can therefore be better understood by taking into account the cognitive mechanisms that control the conceptual and perceptual processing of extra-linguistic reality. Issues central to CS are (a) the notion of prototype and its role in the description of language, (b) the nature of linguistic meaning, and (c) the functioning of different types of semantic relations. The question concerning the nature of meaning is an issue that is particularly controversial between CS on the one hand and structuralist and generative approaches on the other hand: is linguistic meaning conceptual, that is, part of our encyclopedic knowledge (as is claimed by CS), or is it autonomous, that is, based on abstract and language-specific features? According to CS, the most important types of semantic relations are metaphor, metonymy, and different kinds of taxonomic relations, which, in turn, can be further broken down into more basic associative relations such as similarity, contiguity, and contrast. These play a central role not only in polysemy and word formation, that is, in the lexicon, but also in the grammar.