In most countries, the Tridentine Mass was celebrated only in Latin. However, there are exceptions. In early seventeenth century China, Jesuit missionaries secured permission from Pope Paul V to celebrate the Catholic Mass in Chinese, part of an effort to adapt their work to Chinese cultural norms and conditions. In Dalmatia and parts of Istria, the liturgy was celebrated in Church Slavonic, and authorization for use of this language was extended to some other Slavic regions between 1886 and 1935. There, "Tridentine Mass" was not synonymous with "Latin Mass".