Script Inserter takes text from an ordinary text file, converts it using a table file, and re-inserts it into a ROM, changing the game’s text. It can automatically insert line, section, and message breaks for you. It can even rewrite the pointer table for you, but this feature is quite jury-rigged right now, so don’t count on it working with every ROM. SI does not support automatic dual tile encoding or automatic text compression, but future versions may. (You can do it manually, but it’ll be a pain, and it probably won’t be as efficient as it could be.)

C++ source code is included.