They were the others,los gringos.That term was

They were the others,los gringos.That term was
They were the others,los gringos.That term was interchangeable in their speech with another,even more telling(也可以用revealing),los americanos.这是SAT一篇阅读的两句话,求翻译.
还有,请问这句子怎么理解,“That term was interchangeable in their speech with another”已经是完整的句子了,后面逗号接的怎么去理解翻译