Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Mods Editor Tutorials: 1 - Minimal mod template

Nope. Just a minor problem with the root templates. Those books by default look for the text data in those entries listed to populate them.

You can just live with the errors. But errors on startup drive me crazy so it's possible to fix them too.

You can fix those errors by finding the translated string key entries in MAIN and copying them to your mod.

Unfortunately you need to use a PAK extractor to do this.
http://larian.com/forums/ubbthreads.php?ubb=showflat&Number=572322#Post572322

Use that tool, extract the main.pak file, and then in the extracted files go to MODS\MAIN\Localization
and find the files books.lsb and books2.lsb. Copy those to the localization folder in your mod using the same folder structure.