game3 prints every string with the US cart's Latin font, and FrlgFont has
no glyph for a kana, so a Japanese translation of FireRed would print
blank. The US cart still carries its Japanese fonts, which its text
printer draws for a string in Japanese mode (pokefirered/src/text.c:141,
:227): pret builds them into the US ROM, with the normal font's width
table.
The font extractor now bakes both, the normal font from its eight-to-a-row
layout (DecompressGlyph_Normal, text.c:1452) with its widths and the small
one sixteen to a row (DecompressGlyph_Small, text.c:1372), as
chrome/fonts/japanese_{normal,small}_{fg,shadow}.rgba and
japanese_widths.lua. LeafGreen's addresses follow the same -0x24 shift as
the rest of text.o. Cache version 120 re-imports existing caches.
FrlgFont numbers a Japanese character by its byte in the Japanese block of
pokefirered/charmap.txt (kana 01-A0, the full-width space, ！？。ー), plus
the symbols the font keeps at the Latin block's codes in their full-width
forms (digits, letters, 『』「」, 円, ／, ：), offset past the Latin
glyphs. A character with no Latin glyph draws from the Japanese sheet, at
the width the cart gives it (the table for the normal font, 8px for the
small one). Latin text is drawn as before.
thibautbus