That's right. And it's not even clear that they found a correlation that would hold up in different experimental conditions.
The paper is at http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjourna... , and unfortunately has the provocative title "Your Morals Depend on Language", instead of a more accurate title like "There's a possibility that some people's morals are correlated with language, but we're not sure and we're also not sure if that's true for everybody because our sampling is insufficient to allow us to draw such a conclusion".
The paper is at http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjourna... , and unfortunately has the provocative title "Your Morals Depend on Language", instead of a more accurate title like "There's a possibility that some people's morals are correlated with language, but we're not sure and we're also not sure if that's true for everybody because our sampling is insufficient to allow us to draw such a conclusion".