Regarding your question:
Incbin "sudoku.ttf"
Global myfont18:TImageFont=LoadImageFont("incbin::sudoku.ttf", 18, SMOOTHFONT)
Copyright issues apply regardless of you distributing the ttf file or incbin alternative. If the font is yours or public domain you can, if it is not you need permission for distribution.
PLS
Incbin "sudoku.ttf"
Global myfont18:TImageFont=LoadImageFont("incbin::sudoku.ttf", 18, SMOOTHFONT)
Copyright issues apply regardless of you distributing the ttf file or incbin alternative. If the font is yours or public domain you can, if it is not you need permission for distribution.
PLS