i dont understand the whole fisrt declension, second declension, third declension thing.
but there is a first and second declension in the nominative case and all other cases

I'm not looking for an inaccurate, old style globe, but a completely modern globe with all the place names either in Latin, or Latinized.
Max K: Well, you'd add the names of new countries in the same way that you Latinize any name: you assign the name to the most convenient declension, and put it in the nominative case.

Is 3 monkeys in latin written as
triae simiae
with adjective noun agreement
or is it something else?
In the nominative case