The use of language changes according to the situation that we are in. The linguistic register of most language is neutral, that means it can be used in any situation. However, can also be formal, informal, characteristic of a certain professional field, or specific to official notices and forms. And the choice depends on what we are talking about, who we are talking to and how we are taking to them. Be careful not to think of formal language as written and informal language as spoken. Formal language is most typical of official or academic writing and official legal or bureaucratic speech and informal language is typical of conversation, personal letters and emails, and some journalism.
Source of information:
McCarthy, Michael. O’Dell, Felicity. English collocations in Use.
Post written by Carmen Rafecas.