Input the text of everything you want to be randomized on a single line, separate them with commas. There must be a comma after the last item as well for it to work! Example: Scratch,Lua,Python, Press space to reset it. You can easily change the code if you need something other than commas.
This was an attempt to make an input randomizer that could work completely offline, as the one I use requires internet. It can work as an SB2 file and loaded in the offline editor without internet. I uploaded it here translated to SB3 if you want to mess with it yourself.