How does the existence of money reduce the costs of making transactions, relative to a society based entirely on barter?

How does the existence of money reduce the costs of making transactions, relative to a society based entirely on barter? English is becoming the usual language for international transactions,even if the language for neither country is English. How does this reduce the costs of transacting?

QuestionHow does the existence of money reduce the costs of making transactions, relative to asociety based entirely on barter? English is becoming the usual language for international...