Informal:
* Je suis un(e) bête (de classe): This translates to "I'm a class clown" or "I'm a goofball" and is a playful way to say you're a dork.
* Je suis un(e) tête de linotte: This means "I'm a little bird brain" and implies you are silly or forgetful.
* Je suis un(e) tête en l'air: This translates to "I'm a head in the clouds" and describes someone who is absentminded and not very practical.
* Je suis un(e) dingue: This means "I'm crazy" or "I'm nuts" and is a lighthearted way to say you're a bit eccentric.
More neutral:
* Je suis un peu bizarre: This translates to "I'm a bit strange" and is a more neutral way to say you're a dork.
It's important to consider the audience and context when choosing the best translation. If you want to emphasize the endearing aspect of being a dork, use a playful and lighthearted phrase. If you want to be more neutral, you can choose a phrase that simply describes someone who is a bit different.