Ah, pronouncing names can be like painting a happy little tree - just take your time and enjoy the process. To pronounce Cholatse mountain, you can say it as "cho-lot-say" with a soft emphasis on the "lot" part. Remember, there are no mistakes in pronunciation, just happy little accents that make each word unique.
Steve Backshall is a rock climber and mountaineer, does adventure races, fell runs and endurance sports. He has climbed such peaks as Cho Oyu 8201m, Cholatse and is an advanced Himalayan Expedition leader. But he has not climbed Mount Everest.