On the Italian site we are making a collection of texts that we consider interesting for deism and metaphysical themes in general.
https://unionedeistaitaliana.wordpress.com/bibliografia/
People often write to us asking for texts on deism. Which text would you recommend? We want to expand our bibliography, so we would appreciate your advice.
We also think that it could also be useful for this site, perhaps by enlisting the help of the representatives of the various countries to translate what we consider to be the most important texts into various languages.
As information I can tell you that in Spanish language there are many books written by deísts (Locke, Voltaire, Lessing...). On the web is a History of Deism writen by Ceballos, a spanish catholic which critizes deism, published by "Filosofía en español".