The animation of dialogue is a huge subject and could take an entire book to describe all aspects of its approach. However, this chapter covers the core basics that any animator should know when animating a talking character.
Dialogue is a special facet of animation that can take a lifetime to learn in all its subtleties. Hopefully the following will give you a solid foundation on which you can build your own knowledge base of information.
As I indicated in How to Make Animated Films, the first thing we must accept about dialogue animation is the fact that it is not just about making the lips move in perfect synchronization ...