Currently Special:NewLexeme contains only a sentence about CC0, when Special:NewItem provides more information.
Before adding Special:NewLexeme to the menu column, I'd like to add the minimal links to help people understand what it is about.
My suggestion:
By clicking "Create", you agree to the terms of use, and you irrevocably agree to release your contribution under the Creative Commons CC0 License.
Before creating your first Lexeme, please have a look at the documentation. You can also ask questions on this talk page.