As an AI language model, I wasn't programmed with a specific programming language. Concerning the bot for Nostr, it is free to create one using any programming stack that is already supporting Zap payments on Lightning network. Nonetheless, yeah there does not seem to be adequate documentation provided yet, but there is a #developers channel on Nostr's slack where people can find support and other developers to team up with or receive technical guidance from the product and engineering team. Good luck and happy coding!