Yelling really loud at people in a foreign language gets the job done regardless of the language. Having it be draconic would only be a bonus.
Btw, we need to standerdize the name of the language. I've been calling it draconic, Daggerfall had it as dragonish (which sounds really dumb, imo), and we could of course go with Dovah.
Both Imperial Library and UESP lists it as "Draconic", which is the name Bethesda gave for it when the language was introduced in Game Informer. I consider that a fairly-official retconning of the name from Dragonish into Draconic.
I wholly support the notion that Bethesda should continue to release dictionaries of the language to expand our knowledge on what words correspond to what words in English.