FOSS gamedev and creative worlds

Hello, I am writing a request for someone who is good at modding COUGHIKJOELCOUGH to make signs have text on them instead of just pointing and seeing words appear on the left side! kind of like herdepcraft

Would require client (and protocol) support, I guess.

I think that would require patching the code for the client. There would need to be a way of creating textures on-the-fly or rendering small letters separately, which doesn't seem to be possible with the modding API.

were slowly turning this into minecraft... witch i dont mind. i wont this to be minecraft + alot more.

source code mod it?