There are some subtle differences between barbarism, solecism and impropriety. An impropriety is an error related to the meaning of a word or group of words: the word chosen exists but is used in the wrong context or in the wrong way. A barbarism is an error related to the form of the word (for example, an error related to spelling or grammar, often perceptible in speech). A solecism is a syntactic misuse of a word: the construction of the sentence is thus completely distorted. This type of error has a major impact on the quality of a text and the fluidity of reading.