I'm back and after some time with the game I think I'll keep it.
The video compression is awful (even more than the original or the PSP version) with lots of artifacts
Sprites look clean and for the time being I can't spot missing effects, but I'm not an expert on that matter so I don't see much trouble with that other than the UI which gets in the way, and my fat thumbs keep covering areas of the screen causing some enemies to get cheap shots at me due that I can't see them and react on time. It's hard to control the game with touch controls, I don't have a controller with me so I bet it plays much better with them.
The UI is more akin to a mobile game but I'm not quite fond of the stats screen, maybe I'm more used to the classic one.
Regarding the Spanish translation, I'm 5 minutes into the game and we have already SpanglishI have yet to find another at the time I'm writing this (just got to the first save point so far)
Load times are nonexistent on the game (or I am yet to find one) but I experience some audio skip from time to time, and the music seems more muted than the PSP version, like its less quality, even with headphones the music sounds kinda low-fi.
Other problem I face is that I keen making the bottom iOS menu to pop up when trying to reach the attack button due to its position causen the game to sometimes pause unexpectedly. Other than that I have no other complaints.
The continue function seems neat. I quit the game via in game menu on the room were Death's makes its first appearance and after selected "Continue" on the main menu, I started just in the same room with Dead just giving his speech. Haven't tested it further tho.
EDIT: If you close the game via OS it saves your last visited room if you choose to continue, kinda like a save state.
One thing I found funny is that the game just tells you upon a New game to input Maria Or Richter to play as them right away.
Those are my quick impressions on the game. Tested it on a iPhone SE.