Is it correct !
We lost my cousin Soufian when he was five years old, we were all at my grandma's house eating a lunch and he went out alone .
He was lost for two hours , but fortunetly my grandpa found him in the street and he was right [emoji][emoji]

Question

Answer

Nearly, but there are one or two things to fix. You can't run on another main clause after that first comma; you must either replace it with a semicolon or a full stop / period. You also need a full stop after each of your other sentences. "Fortunately" is spelled thus, and it should be "he was alright" rather than "he was right".

Evden çıkmadan dil öğrenme fırsatını kaçırmayın. Deneyimli dil eğitmenlerimizden oluşan seçkimize göz atın ve ilk dersinize şimdi kaydolun!