The last row, fifth from the bottom, in English refers to the position of an item or entity when counting from the bottom of a list or a row of items. This means you start counting from the bottom and move upwards until you reach the fifth item from the bottom.
For example, if you have a list of books on a shelf, and you want to know what the fifth book from the bottom is, you would count from the book at the very bottom and move upwards until you get to the fifth book.