It is an interesting idea. From my own experience of teaching my language to others and learning another language, I have become aware of the fact that there are many words which one knows, but does not use in every day conversation. We know what words like "ubiiquitous" and "cuckold" mean, but we sound distinctly odd if we try to include them in conversation. (I will admit that the latter word is archaic and I do not even know how to pronounce it). I am sure I could think of other examples though.
In the sort of songs most people here like, it is rare to find words which are not, or were not used in everyday conversation.