I don't know what gave you guys the impression that non English was fine outside of the foreign lang board...
but let me tell you this, its not. specially not without even a little try to add translation to it.
consider this your 1 and only verbal warning ill give...
I don't believe so, a 32x32 pix tile, or a 1024x1024 sheet, huge difference imho
but you don't have to duplicate them, just keep them separated, its still better to sometimes load a few smaller tilesets, then a few huge ones.
memory wise its better to load 512x512 I believe, that's what we try to do anyway.
because if you use 5 tiles from a huge tileset, its a bit of a waste
dropbox tends to lock files its uploading, so that could lead to server not being able to write to databse etc.
would be better off writing a script to back up to dropbox imho.