I would do this in After Effects. There's a preset animate in text effect that gives you options to control how much of the text field is visible. I would set it to per word and use hold key frames to reveal as much as I need as the sentence is being spoken. This would take quite a bit of time, though. So I too, am curious if there is any plugin or extension or script that does this more efficiently than my brute force tactics More on reddit.com

insert MJ Popcorn meme More on reddit.com

If you are looking for animation software, a comprehensive list with the most common programs (2D & 3D, free & paid) can be found ->here (this is a link)<- . Common Recommendations: Krita & OpenToonz (2D frame by frame animation) Blender (3D animation, 2D frame by frame) After Effects (Motion Graphics) Toon Boom (rigged 2d animation) If you have trouble with a specific app or program, you are often more likely to find help in the respective subreddit of that program. This comment was posted because the word "app", "software" or "program" was found in your post. If none of the above apply, please ignore this comment I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com

I use Snap Captions with DaVinci Resolve Studio. More on reddit.com