You know this what I love about this forum, the dedication of some people, I had the most perfect mission planned in Litchi for my Mini 2 (going away in September to the location) ive spent an hour testing it in Virtual Litchi mission to make...
Sounds like you have the option for subtitles to be turned on, these are called SRT files if you look at them with your computer set to show file extensions.
Ive just taken a look at the sd card on my new mini 4 pro and it has 3 files shown below...