To a US citizen, a mortgage has a specific meaning.
I'm a US citizen and to me mortgage has a specific meaning which is: a loan secured by real estate, something that most certainly exists here. Just because mortgages are shorter term and usually for a lower loan to value ratio does not mean that they don't exist in argentina.
As an American I'm used to milk coming in gallon sized jugs. The fact that here it comes in smaller 1L sachets doesn't mean that milk doesn't exist in argentina.