Korean: 조반
Japanese: 朝食
Chinese: 早餐
French: déjeuner
German: Frühstück
Italian: prima colazione
Portuguese: pequeno almoço
Russian: завтрак
Arabic: الأفطار
Spanish: desayuno
Finnish: Aamiainen
Swedish: Frukost
Greek: Πρόγευμα
English: breakfast

keep in mind that i don't speak to many languages...
so if you are a native speaker of one of these, feel free to correct me =D
or add your own