

“Travelers” does generally refer to the Romani and Sinti people who live a nomadic lifestyle.
The French version of the article uses the phrase “les gens du voyage”, which according to the French Wikipedia page is often used to refer to the “Roma of France (including the Sinti and the Gitanos)”.
So I think it’s fairly safe to assume that that is what they mean with “travelers” in this article.
The article does say that it was the local council that wanted to prevent them from moving there.
I’m not saying there definitely is a discriminatory motive… I do not know how the people of Switzerland look at the Romani people.
But given the way Roma are treated in much of Europe, and Switzerland’s reputation for being somewhat conservative, I am not discounting the possibility that they are being discriminated against here.
The equivalent in the US would be if a couple of families of black people wanted to move to a predominantly white town in the south, and the county would step in claiming there are no more homes available.