Oh boy*innen that a doozy! (pardon the gendered Denglisch pun @Sagaliciouzzz ) It's not great, it's a bit better in Dutch (except for the Southern Dutch regiodialects which remain heavily gendered and using declensions that have largely disappeared from the rest of Dutch language just as it did more fully with English).
The Germanic languages section of this article gives a brief introduction, some examples of signage and links to pages that further explain the Gendersternchen, Binnen-I, unterstrich. There's truncated English translations or parallel English equivalencies available for those articles within Wikipedia.