mi fai sentire bella (you female) - mi fai sentire bello (you male)
si guarda stordimento
"Stunning" in English means spettacolare in Italian.
Rimanere spettacolare! or Rimani spettacolare! in the singular and Rimanete spettacolari! in the plural are Italian equivalents of the English phrase "Stay stunning!" Context makes clear which form suits. The respective pronunciations in Italian will be "REE-ma-NEY-rey spet-TA-ko-LA-rey" or "ree-MA-nee spet-TA-ko-LA-rey" in the singular and "REE-ma-NEY-tey spet-TA-ko-LA-ree" in the plural.
Stunning as in attractive, would be translated as migoto (na); the na is necessary depending on what you are describing as attractive but you don't need it to simply say "stunning" 見事 (みごと)
Piccola, sei splendida! is just one Italian equivalent of the English phrase "Babe, you are stunning!" The pronunciaton of the feminine singular phrase -- which translates literally as "Little one, you are splendid!" -- will be "PEEK-ko-la SEH-ee SPLEN-dee-da" in Italian.
you are stunning
"Stay out!" in English is Rimanere fuori! in Italian.
Use google translation
There are many French words for 'stunning'. You might say 'C'est stupefiant' or impressionnante, sensantionnel or fantastique. If you were thinking of physically stunning, like a loud noise, you'd say 'C'est etourdissant'. (The e should have an acute accent).
malikah (queen) mothhilah (stunning) or if you mean that its very beautiful you can say fatinah(stuning) so it will be : malikah mothhilah in arabic the adjective comes after the name
votre bébé est superbe
usted es sorprendente//magnifico/a
You can say "आप भविष्युप्रिय लग रहे हैं" (aap bhavishyupriya lag rahe hain) to express "you look stunning" in Hindi.