Why do scientists use two-word scientific names instead of common names?

The two-Word Latin names are essential to scientists because they are the common names that scientists all over the world use in the same way, relardless of their own language, to describe the family and species (hence the two Words) of all living things. Without the Latin name, scientist would be endlessly looking in dictionaries to find out which organism exactly a scientist from Another Country was describing in an article or book and there would be endless misunderstandings between them if all countries and language groups had their own way of naming and classifying living organisms.