informais

Informais is the plural form of informal in Portuguese. It can function as an adjective describing things that are casual, nonstandard, or not bound by formal rules, and, in certain contexts, as a noun referring to people or practices characterized by informality.

In linguistic and sociolinguistic contexts, informality denotes a language register that contrasts with formality. The informal register appears in everyday speech, personal writing, and some casual digital communication. Typical features include contractions, slang, diminutives, colloquial expressions, direct forms of address, and simplified syntax. Speakers often switch between informal and formal styles depending on audience, setting, and purpose, a behavior known as register shifting or code-switching.

Socially, informality can signal closeness, friendliness, or egalitarian attitudes, but it may also affect perceived credibility or professionalism in formal domains such as academia or administration. Regional and cultural norms shape what is considered informal and when it is appropriate. For example, informal speech may be preferred in daily conversations, among peers, or in informal online communities, while formal language is expected in official documents, ceremonies, and professional environments.

In practice, informais influence how people communicate across media and institutions. Digital platforms, messaging apps, and social networks often encourage informal styles, yet many contexts—educational settings, business communications, and public discourse—continue to favor more formal language for clarity and authority.

See also: formality, informality, sociolinguistics, Portuguese language, informal economy.