private fork not suitable for general use - it is a customised version of StreetComplete, called Zażółć. Includes some changes that were rejected in StreetComplete, changes unsuitable for general public and features that I test before potential inclusion in StreetComplete
It is a message displayed to user, code here passes a reference to the string. You can change it to the new, not yet existing one and use a built in tool to place text.