This was really clever, crafty in the best sense of the word. I was not familiar with the term spoonerism, even though we also engage in such word play, in most cases with nonsensical results, which can be funny in the language of origin but impossible to translate.
I learned the word while writing this post. I was looking for another one that means "uses super big words" but spoonerism was really the word of the day and it led me to my ending. Super fun exercise!