How to choose the subtitle language? Step 1 Once the video is opened,click on the “CC” icon to turn it on. The color of the CC icon will change when it is on. Step 2 Click on the “wheel” icon, and find the Captions line.By the way, you can choose the playingspeed of the video by clicking on the Speedline. Step 3 Choose your subtitle language by scrolling down and clicking on your desired language.