Imbue locale.
  Imbues the locale loc to the stream buffer. During the process protected virtual member imbue is called.
  A locale object contains culture-specific information.

Parameters.

loc

locale object to be imbued.

Return Value.
  The locale object associated before the call.

Basic template member declaration ( basic_streambuf<charT,traits> ):

locale pubimbue (const locale & loc);

See also.
  getloc
  streambuf class