Could you please clarify what you meant by "dupluan"?
Perhaps you meant one of these words, or a combination of them:
* Duplicate: A copy or reproduction of something. Examples:
* A duplicate key
* A duplicate file
* A duplicate entry in a database
* Duplicate (verb): To make a copy of something. Examples:
* Duplicate a file
* Duplicate a key
* Duplet: A musical interval spanning two degrees.
* Dual: Consisting of two parts or elements. Examples:
* A dual-core processor
* A dual-purpose tool
If you can provide more context or an example of how you heard or saw the word "dupluan," I may be able to provide a more helpful answer.