Baybayanon/Utodnon language was also known as (Old) Leyte because it was spoken in the island before the arrival of Waray (in the east) and Cebuano (west and south). It was said that this language is closely related to Waray; in fact, they belonged to the same branch of the Visayan language family (Central Visayan branch). It's still spoken in the town of Baybay.
Here's the challenge: Make Baybayanon/Utodnon/(Old) Leyte language by most of the island's population. The PoD is during the Spanish era, particularly the first century.
Bonus points if you make the dialect spoken in Baybay the standard language.