It's funny all this talk of diction.One of the things my 2 youngest have to learn as part of language arts,is not only the spelling,definition,whether it is noun etc, but where the stress is in each word.I cannot help at all with that part, as the stress part of the word is totally different in America cf England.
A very simple example that bugs me is Oregano, here the stress is on reg. in England it is on gan.