Is there any valid source for the claim that Voltaire' house has been used by the Bible Society? I heard this many times, but I've never read a valid source for it.
Apparently it is not true:
There is an apocryphal story that his home at Ferney was purchased by the Geneva Bible Society and used for printing Bibles, but this appears to be due to a misunderstanding of the 1849 annual report of the American Bible Society. Voltaire's chateau is now owned and administered by the French Ministry of Culture.
While the exact details may not match the most popular versions of this story - the house being used (ie on an on-going basis) by an actual Bible Society - there is evidence of a kernel of truth from which this story came.
This evidence is found in the wikipedia article on Voltaire's* home in Geneva from 1755 - 1760 "Les Délices" (See in particular the paragraph:"After Voltaire"), which cites an article in reference to the question, by Rev. W. Acworth (1836) from "The Missionary Register." (mouseover reference 6 - which contains a clickable link to the full article in GoogleBooks.)
The article verifies some of the details used to the 'refute' the original story (that this home was never used or owned by a Bible Society per se and is currently being used as a museum dedicated to Voltaire's life and works). This source asserts that the home WAS owned by the President of the Evangelical society of Geneva and used during this period as a repository for Bibles:
I went through Geneva, and was much refreshed by meeting the Committee of the Evangelical Society ... The room where Voltaire's plays were acted ... had been converted into a sort of Repository for Bibles and Religious Tracts. - Rev. W. Acworth (1836). "Bible Notices in Switzerland and Italy". The Missionary Register (London: L & G Seeley) 24: 352
*a nom-de-plume; real name: François-Marie Arouet
I don't think we can determine the truth about one of Voltaire's houses being used to print Bibles, only what sort of website considers it a fact. Here is a reference that quotes wiki and explains that there was a second house -- actually in Geneva. Feel free to believe or disbelieve this version, as you prefer, since this site doesn't have any references.
The Voltaire home that the 'Geneva Bible Society' purchased
was the house in 'Geneva, Switzerland;
NOT the one in Ferney, France.
In Geneva, he bought a large estate (Les Délices) and this is the one used to distribute Bibles.
It is not known if the Wikipedia statement is to "to deceive intentionally" or by ignorance. We would have to think they know the difference between the Homes in France and Switzerland.
FACT: The French Ministry of Culture operates the house in France!
FACT: The Geneva Bible Society operates the house in Geneva.
The following article, by a non-believer, is mentioned at the link above:
http://www.nzarh.org.nz/journal/2004v77n1aut.pdf (see toc for article about Voltaire's house)
This appears to be somewhat carefully researched, although I didn't check his references. If it is correct, none of Voltaire's houses were used by Bible societies. The article suggests the story may have originated due to a hotel Gibbon, from which many Bibles were sold, being mentioned in a book in the same sentence as Voltaire.
Apparently, the house in Geneva was used for storage and distribution of Bibles. The house in Ferney, France was not used for storing or printing Bibles, but the presses of the nearby printers who printed his works while he lived there were used to print Bibles. That functions just as well for irony and poetic justice. Here are two links to articles that give the sources. https://crossexamined.org/voltaires-prediction-home-and-the-bible-society-truth-or-myth-further-evidence-of-verification/ also see this: https://bellatorchristi.com/2019/03/18/voltaires-prediction-home-and-the-bible-society-truth-or-myth/