younger is translated "plus jeune" in French.
You would say "petite sœur" in French to refer to a younger sister.
L'élève (secondary school or younger) L'étudiant (university)
If you are speaking to an elder or someone with more power, you say Bonjour. If you are talking to a friend of a younger person, you can say Salut
un diaporama (but the word slide / slideshow is understood, and used by the younger generations)
Homme = Man Garçon = Guy, used more commonly when the person is younger
younger sister in french is sil vais plaitority it does not sound right i know but that is how you say it "sill vase plat it or ityi would have also thought you could say "sœur cadette"
"Est-ce que tu as une petite soeur / une soeur plus jeune ?"
younger : plus jeune older : plus vieux
plus jeune.
If you want to address someone formally, say "toute votre aide". If you want to address either a friend or someone who is younger, use "toute ton aide".
"Plus jeune" means "younger" in French.
젊은 친구 = younger friend