What does a typesetter do?
A typesetter puts the translated text into text bubbles, narration squares(rectangle), sound effects, translator notes, and etc.
-Use the correct font for different corresponding speeches(Narration, Bubbles, etc..)
-Be sure that the SFX font choice is befitting to the one from the originals
-Copy or follow the text styles(bold/stroke, font color(black or white), pattern overlay, etc…) as the originals
-All text layers are compiled into a folder
-Center the text as much as possible
-Choose an appropriate font size
Check these posts for more info~
Or just check the #typeset101 tag