A Filipino dialect (Waray) (1st choice) - 2.6 million speakers - Eastern Visayas, some parts of Masbate, and some parts of Sorsogon - Cebuano, Tagalog, English - Its transmission: regional language, used in the local government, used in visual media, but not print media; taught in school from K to 3rd grade; in Mass (Waray Bible) - ISO code: war
A Japanese dialect (Ainu) (2nd possible choice?)
- Hokkaido - Japanese - Its transmission: Rarely any as there’s only single digit number speakers at this point I believe.
- I think the estimate of finding text will be very small; I found this document about Ainu, but I had a hard time making it accessible https://www.degruyter.com/document/isbn/9781501502859/html - ISO Code: ain
Tiwi (3rd choice)
- Polysynthetic language - 2,040 speakers - ISO code: tiw - Bathurst and Melville Islands, Northern Terrority - English - Its transmission: 10% of it is taught to children - https://ebible.org/tiw/MAT01.htm,,,