Thread:JoshuaJSlone/@comment-6092594-20180218221441/@comment-131168-20180219011307

The #invoke:Birthday bits in those pages point it to Module:Birthday where the real code is. Here's H!P Wiki's version. The section with all the BirthdayInserts is what you'll want to replace (or add to since there's so much overlap).

One thing of note that might save some time. You'll notice the BirthdayInsert thing includes both standard and Japanese name versions. The main reason for this is since I was making it for multiple languages in mind, the same BirthdayInserts can be used on the Japanese H!P Wiki, with just small tweaks elsewhere in the code to tell it which one to use. So if that's not something you're worried about, leaving those quotes empty shouldn't harm it.