General interest:
* Intéressé(e) (masculine/feminine): This is the most common and general translation for "interested."
* Passionné(e) (masculine/feminine): This means "passionate" and implies a stronger interest.
Specific interest:
* Intéressé(e) par...: This is used when you are interested in something specific. For example: "Je suis intéressé par la musique." (I am interested in music.)
* Curieux(se) de...: This means "curious about..." and implies a desire to learn more. For example: "Je suis curieux de savoir ce qui s'est passé." (I am curious to know what happened.)
In a conversation:
* Ça m'intéresse: This means "That interests me."
* Je suis intéressé(e): This means "I am interested."
* J'aimerais en savoir plus: This means "I would like to know more."
The best translation will depend on the specific situation and the level of interest you are expressing.