"Good morning, soldier!"

Translation: Jó reggelt, katona!

[katkakiss1]

There are actually two definitions of the word "katona."1,a soldier,2,a sandwich cut up to bitesize.

[JFORD574]

Why reggelt? Because it is an object?

[96314081311257]

The original phrase is "Jó reggelt kívánok!" = "I wish (you) a good morning."

[chris560682]

Why is it sometimes "reggel" and sometimes "reggelt"?

[dcseain]

Reggel is nominative and reggelt is accusative.

[dcseain]

See the comment above yours for why its reggelt here.