How to speak Pali naturally?

We are introducing two new books on speaking Pali.
1.) Pāli Kathāsallāpo (A Handbook to Speak in Pāli)- Ven. Dr. Mānākada Khemānanda
2)    

Pali Pictorial for young and old - Part 1 自然的讲巴利- by Aggacara

Pali Grammar with some grammatical explanation.
Listening to more chantings and learn the grammar will improve on your ability to speak in Pali. These documents i.e. Buddhavandana, Dhammavandana, Sanghavandana contain the chanting and grammar points.