This sentence highlights the following:
* "Aptitude" refers to a natural ability or talent.
* "For languages" specifies the area of aptitude.
* "Allowed her to quickly learn" demonstrates the positive outcome of her aptitude.
Here are some other examples:
* "His aptitude for math made him excel in his engineering course."
* "She has a natural aptitude for leadership, which is evident in her ability to inspire her team."
* "The company was impressed by her aptitude for problem-solving during the interview."