/tʃ/ is borrowed from loanwords.
Sounds [dʒ, ʃ] are heard from borrowings as a realization of sequences ⟨di, si⟩.1
"Were you there at the market for a long time?" translated into Albay Bikol languages, Coastal Bikol and Rinconada Bikol.
Borja, Nhia (2024). Diaspora Documentation of West Albay Bikol. CUNY Academic Works. ↩