Are we allowed to use custom dictionaries to run this game or just the base one that comes with it?

Well, a ¤¤custom¤¤ dictionary could make every word a single letter, even on bosses.  It's not listed in the list of the rules, but that's a vastly different game than using core dictionaries.  

I would say no, unless we make a separate category.  Typing game speedruns are pretty niche already, removing the typing makes it more of a meme.  There would be no skill involved, as there aren't any known skips to skip parts of the route, there's no aiming, and there's no need to even check what's on the screen.  Since loading and cutscene times are removed from Overkill runs, the only real 'race' would be 'don't grab the slow-mo power-up' and...what, frames per second your computer could push out, to generate and advance the level faster?  That's not a human competition, and also the game is hard-locked to either 30 or 60, so that's probably not a machine one, either.

If we're talking about the ¤DLC¤ dictionaries, those ought to be balanced and fair and I'd argue those would be OK to use.  But I haven't even tried them out casually, so I certainly won't put them in the speedruns yet, even if it would be fun to have new stuff to type.

I was talking about the dlc dictionaries, maybe put them in different categories even?

I'm a little worried about fragmenting the community further, which is just now starting to take off.

The problem is that if we DO allow custom DLC dictionaries and one of them turns out to be advantageous, then people who haven't purchased that dictionary are all at a disadvantage on the leaderboard.  I could try to separate this out but then I need to make a category for every difficulty with every permutation of every custom dictionary and that gets completely out of control in an exponential way and quickly makes the leaderboard look ridiculous.

So, for these reasons... I'm not really in favor of people using custom dictionaries... but I'm not a brutal Overkill dictator and am interested in community input on how to handle it in a way that isn't stupid.