General "sometimes":
* Parfois: This is the most common and general translation for "sometimes".
* De temps en temps: This translates literally to "from time to time" and is slightly more formal than "parfois".
* Quelquefois: This is a less common synonym for "parfois", but it has the same meaning.
More specific "sometimes":
* Occasionnellement: This emphasizes that something happens on special occasions.
* De manière occasionnelle: This is a more formal way of saying "occasionnellement".
* Souvent, mais pas toujours: This translates to "often, but not always" and emphasizes that something happens frequently but not consistently.
* À l'occasion: This literally translates to "on the occasion" and indicates something happens on specific occasions or events.
The best way to choose the right translation is to consider the context of your sentence and the nuance you want to express.