If you have any feedback regarding the project, send an email to app@motî.net. It can be anything, a bug report or just general feedback.
Please don’t contact me regarding missing or wrong dictionary content. It has been produced collaboratively over the years by many different people. Instead I encourage you to get familiar with the Wiktionary project and its principles.
If you want to become a contributor and make changes or add new entries even better! Have a look at How to edit a page for some basic information on how to get started.
There is also the Information desk, a place where beginners can ask questions.