When I first read this I thought -- "Wha?" No poet is associated more with exotic imagery than Coleridge. But thinking back on his most famous poems I was struck by how plain the language was. Read "Kubla Khan" [here] and note the simplicity of the words.
Works of imagination should be written in very plain language; the more
purely imaginative they are the more necessary it is to be plain.
Samuel Taylor Coleridge
Then go here and note the exotic forms used by Keats in "La Belle Dame Sans Merci".
Quite a difference -- no?