采访者外孙在英语中可以翻译为 "interviewer's great-grandson"。这个词组来源于拉丁语，"interviewer" 是 "采访者" 的意思，"great-grandson" 是 "外孙" 的意思。

以下是一些英文例句及其中文翻译：

The interviewer's great-grandson asked me about my childhood. (采访者的外孙问我关于我的童年。)

I met the interviewer's great-grandson at the family reunion. (我在家庭聚会上遇到了采访者的外孙。)

The interviewer's great-grandson is interested in learning about his family history. (采访者的外孙对了解他的家族历史感兴趣。)