I don’t know how we can check this, but I would be willing to bet that the term used in the language in which the article was originally written was religious “toleration”, rather than religious liberty.
Religious toleration is the term that was used in those days. In fact, at Vatican II there was a fight over the use of the term religious liberty. The conservatives, such as Cardinal Ottaviani, argued that religious toleration was the correct term - since the use of the term “religious liberty” implied a right. I find it hard to believe that anyone would have used the term religious liberty in those days.
In the encyclical Libertas of Leo XIII, the Pope condemned the idea of religious liberty as being a false liberty. In the same encyclical, however, he did teach the concept of religious toleration.
I’m only on page two of the link, but so far he is arguing exactly according to the principle of religious toleration, and not based on the idea of religious liberty.
Religious liberty implies that man is free to embrace and profess that religion which, guided by the light of reason, he shall consider true.
Religious toleration, on the other hand, means that, while man has no *right *to practice a false religion, it is sometime prudent for the State to tolerate it in order to maintain order in society.