Hindi, Sanskrit and Pali are common in Buddhism. When assembling Buddhist scriptures, Sanskrit is an elegant language and Pali is a common saying.
It is good to recite scriptures and hold spells in Sanskrit, but not many people in China know Sanskrit. It is more beneficial to recite Buddhist scriptures in Sanskrit (siddam, whose root is magic and achievement), especially to recite incantations in Sanskrit, than to recite them in Chinese, but yes, it is also true to use Chinese if you don't understand Sanskrit. Sanskrit is the language of Brahma.
Recommended Sanskrit Learning Path: Baidu Video Lin Guangming Sanskrit Speaks Lecture Hall.
Lots of questions. Then the more famous ones in pdf format are (Buddhist Encyclopedia), Sanskrit easy to learn and zero-based. You can download it online, as if it were in Sina materials.
Sanskrit is not difficult to learn, and it is also a human language. There are more than forty letters, and consonants (similar to initials and consonants) are connected by variants (conjunctions). You can also worship Buddha and Bodhisattva at the same time if you want to learn.