Russian version of the map editor for Heroes 5: "Tribes of the East" (3.1).

is it possible to translate the names of monsters myself? I understand that it's not really necessary and it's clear anyway, but still...

you need special programs for that.
I tried Reshacker, but I didn't manage to do much (the editor didn't work afterwards).
Besides, the names of monsters and buildings may not be in the editor itself.
They are more likely to be in separate files.

otherwise, you won't understand what the building is for

when you hover the cursor over a building, a window pops up explaining what the object is for.