I’ve been asked couple of times to make text appear longer on the screen during video editing. So today I finally goolged average reading speed for different languages. It’s 17 characters per second for adult programs. And 13 characters per second for children’s programs.
For example phrase “Netflix is an interesting reference for different video related topics” should stay on the screen around 4 seconds (61/17). Here is interesting guideline for text style:
https://partnerhelp.netflixstudios.com/hc/en-us/articles/217349997-Castilian-Latin-American-Spanish-Timed-Text-Style-Guide