<prompt> Translate the following text to SwahiliDuring the 1970s, Ekman developed a method called the Facial Action Coding System FACS to measure all visually discernible facial movement.  <response>: Katika miaka ya 1970, Ekman alianzisha mfumo wa Facial Action Coding System FACS ambao ulitumia kupima mwendo wa uso unaoonekana kwa macho. 