We just learned that in Russian I am happy is Я счастлив (ya shastliv).
Now let's learn how to say You are sad.
Ты грустный
You - Ты (Ty) - sounds like too 文A
sad - грустный (grustnyy) - Sounds like g-dr-oo-ss-t-n-ee 文A
So all together Ты грустный (Ty grustnyy) sounds like Too g-dr-oo-ss-t-n-ee.
(from: wikipedia - russian academy of sciences)
Norwegian: du er lei deg.
Greek: Είσαι λυπημενος
ASL: You are sad
Italian: Sei triste
German: Sie sind traurig
Spanish: Estas triste
French: Vous êtes triste
