Do the Abhidharma texts exist online in original format? I just learned of the Abhidharma. What was their original or early language they were written in, and do they exist online in copy/pastable (non-PDF or image) format anywhere for free? Is this of any use?
You can find Theravada Abhidhamma, all Pali, only some translations, at Sutta Central:
https://suttacentral.net/ds
https://suttacentral.net/vb
https://suttacentral.net/dt
https://suttacentral.net/pp
https://suttacentral.net/kv
https://suttacentral.net/ya
https://suttacentral.net/patthana