I would call all these "big" languages, but I would not call Mandarin, Hindi or Arabic "global" languages. There may be over 700M speakers of Hindi/Urdu, but they live mostly on the Indian subcontinent and Hindi is not really a language of global business or education.
Spanish, and outside the above list, French, are more "global" languages in the sense that the language is a majority-dominant and/or significant language of business on several continents.
(FWIW I do know English as second language and understand a few words of French and Spanish, and can get along with everyday things in Mandarin, though I am more fluent in a couple of other small languages (Swedish and German). I am certainly not belittling the mentioned big languages, I just do not think they are truly "global".)