In the section: “Add New Event Category”, enter the name of the new city in the form: HACKING HEALTH – [City].
In the “Slug” field, enter the name in lower case, in this form: hacking-health-city.
From the drop-down menu: “Parent Event Category”, select the country of the new city.
Then select the language from the drop-down menu: “Language”.
Click on “Add New Event Category”.