Built-in font in subtitles

[SuperZombi]

How to specify a font file when generating subtitles in ffmpeg.
And also don't specify the font name in the ass file, but instead specify the path to the font file.

I also noticed that there are two font files in the game folder.
As I understand, one of them is for Chinese and the other is for Japanese. But they also display correctly in other languages.
So, which file should be built into a program?

Any help will be useful. Thanks.

[ryanokushi]

Using diffenator2, the only differences seem to be Chinese characters that are also used as Japanese kanji, with the zh-cn font having the simplified versions of the characters vs the ja-jp font having traditional versions of the characters.

zh-cn.ttf font

ja-jp.ttf font

Since both fonts can still properly display all other characters, it shouldn't really matter, just up to user preference whether they want Chinese traditional vs. simplified characters.

P.S. I believe most Chinese/Japanese readers can read both interchangeably, but I'm biased toward the Japanese font since I can read Japanese.