SpriteFont is some scripts for GM8.X to draw non-English text.

GM8.X currently does not support non-English text drawing. Although there is a nice text drawing extension called FoxWrting (https://github.com/Noisyfox/FoxWriting), it only supports GM8.0 and has some compatibility issues.

SpriteFont is essentially a large sprite and some glyph information. So you have to convert .ttf to them first. Open FontBuilder.exe:

First select a TTF file, then set its size (text height), then select the text range you want on the right, and finally click Build, the tool will automatically generate Sprite images and glyph information.

Then you need to click the "Save" button below them to save both the generated image and glyph information to a .png file and a .glyphs file.

Open your GM8 project, then import SpriteFont.gml (you can drag and drop), call sf_init() once when the game starts, then use sf_font_add() to load the font, and finally use sf_draw_text() to draw the text.