Looking at the PPU viewer, it seems as though the game has two different fonts. The normal one used for "AMAZING PAPERBOY DELIVERS!" and probably other in-game text, and a secondary one used for the article titles.
The secondary font seems to be scattered and incomplete. That is, it only has like 2/3 of the alphabet.
In any event, as long as you don't need any of the missing letters, all it should take to be able to edit it is a separate table file.