Making up words is fun for the writer, but it often not fun for the reader. Like the popular perception of poetry. Few people have a deep knowledge of their own language or other languages, so their inventions come across as childish.

Your own usage of “dags” is frustrating because as a reader from Australasia, “dag” has a common meaning. Example usages: “You’re a dag”, “Fred Dagg”, “rattle your dags”, “clean up those daggy sheep”. And back on topic, the common meaning in Australasia is not mentioned in the online American Merriam-Webster dictionary!