Remove setback for dark, hot, or dry conditions, add setback for bright, cold, or wet conditions.

Twi’leks speak Ryl, yet they are skilled linguists, and almost all of them also know Basic. The more special language of the Twi’leks is Lekku, or Twi’leki. Using subtle movements of their lekku, they can add emphasis to everyday speech. In some cases, they choose to rely entirely on Lekku, communicating in perfect silence