"Sretan Bozic i Nova Godina" means "Merry Christmas & New Year" in Croatian, but if you want to say "Merry Christmas & Happy New Year" you write " Sretan Bozic i Sretna Nova Godina".
クリスマス、日本で That should be it. The Japanese language is a subject, object, verb consept. So if you wanted a translation if anything make sure to use that format, for example, you...