Can I draw fanart/write spinoff fic/make podfic/some other sort of transformative work?

As long as you show me! And don't monotize it!

Translate into another language?

Yeah that too (with credit to the original)

Are you ever going to update/finish [x]?

If it's a fanfiction, then yes, I eventually intend to. Someday. Eventually. When my brain decides to work properly. If I ever decide to fully abandon a work, I'll make a note of it somewhere.

If it's something else… Maybe. Maybe not. Best bet is to yell about whatever theories/ideas it made you have at me which might spark inspiration again.

Where can I yell at you though?

Tumblr is your best bet,but you can try strawpage too: https://domoz.straw.page/