This is a map I've been working on for a couple of weeks. It shows Germany's colonies in Mesocarolina (The Americas are called Carolina in this world, "Meso" just means "Middle" or "Central", so it's central America) and has some information on the demographics of the area. As in our timeline, almost all the native population has been wiped out. As it was Spain (in personal union with Portugal) that first found and colonised the Americas in this world, all of the colonies have hispanic majorities. Germany gained their various colonies through various means across the last two hundred years or so, leading to some colonies having far higher German populations than others.
Whilst it would appear that Germany is the dominant force in the Carribean, Britain has significant holdings in South Carolina (South America) and currently controls the Panama canal (built in 1878 in this timeline). Whilst there have been several proposals to construct a competing canal across Ometepea, no one has been able to find the support and funds to begin such a project, and Britain has inevitably done their best to prevent such an occurance.