ViewLift support video content with multiple audio tracks. Email support to test and switch your encoding profiles. Before you do that please make sure your source video looks like our sample
Source file used for encoding: https://v-tvod.viewlift.com/MezzFiles/2020/05/multi-audio-labeled.mp4
It has English and Spanish audio.
Once encoded it the output for you to preview on our platform on a test site: https://site-tvod.viewlift.com/videos/multi-audio-elephants-dream