Simplify the following text for a Grade 9 native English-speaking person.
Original: Margrethe II ( Margrethe Alexandrine Ã Ã rhildur Ingrid , sometimes anglicised as Margaret II ) ( born 16 April 1940 ) is the queen regnant of Denmark .
Simplified: Margrethe II ( Margrethe Alexandrine Ã Ã rhildur Ingrid ) ( born 16 April 1940 ) is the Queen regnant of Denmark .