Why do speed runners use different languages [duplicate]

I've been watching many different speed runs of all my favourite games; Horizon Zero Dawn, Legend of Zelda, Dark Souls, etc.

However one thing I've noticed is that they often use a different language to run the game in, often when they don't speak the language (or at least don't appear to, like playing in German, while speaking English with an American accent).

Why is this?

If a game has a lot of text to scroll through, there is a chance that in another language you have to scroll though fewer text to save some seconds for your run. Or the voice acting goes a little bit faster. Maybe sometimes some roms have unique time saving bugs. Here's a language comparison video for the legend of Zelda

Games may have releases where some languages have less text to skip through or flaws/defects/bugs unique to a particular language release. Advantages offered by a particular release are valuable to a speedrunner trying to shave off a few seconds.