Hello Hirde,
Right now there is no english manual to create Addons for Allods. What you can do is use google translate to read the russian guides on alloder.pro. I suggest using
this and
this.
Hopefully, I'll manage to create some basic guides in the near future.
If you'll check the Docs folder (data/Mods/Docs), you will see an archive with the current API. There you can also find basic information about the structure of addons.