She is very keen to learn new languages.

having or showing eagerness or enthusiasm
He is keen on playing soccer.
She has a keen interest in art.
They are keen to start the project.
keen interest
keen to learn
keen on something
eager
enthusiastic
avid
Her keen eyesight helped her spot the tiny bird.

sharp or penetrating in quality; intense
He has a keen interest in history.
Her mind is very keen and sharp.
The dog has a keen sense of smell.
keen eyesight
keen interest
keen mind
sharp
intense
eager
She is a real keen on photography.

a person who is enthusiastic or eager about something
He is a keen gardener.
She is a keen student.
They are keen hikers.
a keen interest
a keen observer
a keen competitor
enthusiast
aficionado
devotee