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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.
This change in mode is termed a mode switch, not to be confused with a context switch (although it sometimes is), which is the switching of the CPU from one process to another. When a user process runs a portion of the kernel code via a system call, the process temporarily becomes a kernel process and is in kernel mode.