Any currency that is exchanged in markets outside of its own country is referred to as xenocurrency. It gets its name from the Greek word “Xeno,” which means “foreign.”
Because the word xeno may have negative connotations in modern English, the term xenocurrency is rarely used nowadays. For example, xenophobia refers to an unreasonable fear or hate of outsiders. As a result, the phrase “foreign currency” has come to be used to refer to non-domestic currencies.