Simplify the following text for a Grade 11 native English-speaking person.
Original: Mitsubishi has used the name twice previously , first as the marque of a series of kei cars and subcompact cars in the 1960s , and then as the export version of the Mitsubishi Mirage hatchback in the 1980s and 1990s .
Simplified: It was first introduced as a series of kei cars and subcompact cars in the 1960s , and then as the export version of the Mitsubishi Mirage hatchback in the 1980s and 1990s .