In which country would you call a bus an omnibus? Cuba,Argentina, spain

Answer 1

In Spain, a bus is commonly referred to as an "omnibus." The term "omnibus" is derived from Latin and has been historically used in many Spanish-speaking countries, although "autobús" is more widely used in modern contexts. In Cuba and Argentina, the term "autobús" is more prevalent as well. So, Spain is the answer to your question.