Here's how I do it:
Type_Speed is a global var set to 0.03 (or whatever speed you want).
The important part is setting the text to the sprite font before you run the typewriter text e.g., Sprite font set text: "Hello World!"
Hope this helps.
Hello Pigpud, thank you so much for your advice!
I've tried but I still failed.
I think this issue is mainly on the array, although the feature I'm working on is about the story, but the text displayed is from an array which includes different languages, so I doubt the issue is here, for the text part, it is from an array instead of a fixed text.But I don't know which part is wrong and how to fix it.
Here is the screenshot of my part, hope this can help to clarify my situation: