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In linguistics, code-switching occurs when a speaker alternates between two or more languages, or language varieties, in the context of a single conversation.peakers form and establish a pidgin language when two or more speakers who do not speak a common language form an intermediate, third language. On the other hand, speakers practice code-switching when they are each fluent in both languages.
The most common type is a push-to-make (or normally-open or NO) switch, which makes contact when the button is pressed and breaks when the button is released. Each key of a computer keyboard, for example, is a normally-open push-to-make switch.