Template:MultiLicensePD/documentation
Editors can display this template on their own userpage to indicate their desire to dedicate their Wiktionary contributions to the public domain and license them under the GNU Free Documentation License in addition to licensing them under the Creative Commons Attribution-ShareAlike 4.0 International License (CC-BY-SA, the default). This is intended to remove restrictions on anyone who wants to reuse or redistribute their contributions, as it is meant to give them the option of either following CC-BY-SA or following the GFDL or doing whatever they want (public domain).
It takes no parameters.