It is important to note that "mangetar" is a gender-neutral term in Hindi, and can be used for both male and female fiancés.
For a more specific translation, you can use:
* मंगेतर (mangetar) for a female fiancé
* मंगेतर (mangetar) for a male fiancé
However, in everyday conversation, मंगेतर (mangetar) is commonly used for both genders.