….in different languages:

Chinese (Cantonse) : 食飯 (sihk faahn) – eat

Chinese (Mandarin) : 慢慢吃！ (mànmàn chī!) – eat slowly

Danish : Velbekomme!

Dutch : Smakelijk!

Fijian : Da kana!

German : Guten Appetit!

Japanese : いただきます (itadakimasu) – said before a meal

ご馳走さまでした (gochisōsama deshita)– said after a meal

Italian : Buon appetito!

Korean: 잘 먹겠습니다 (jal meokkesseumnida) – before a meal

잘 먹었습니다 (jal meogeosseumnida) – after a meal

Norwegian : Vær så god! Vel bekomme!

Polish : Smacznego!

Portugese : Bom Apetite!

Swedish : Smaklig måltid!

Tagalog : Tayo’y magsikain (formal)
Kainan na! (informal) – Let’s eat!

Turkish : Afiyet olsun!

Enjoy!