在中文中，"96岁爷爷"可以翻译为"96-year-old grandfather"。这个短语来自于对一个96岁的男性的称呼。在英文中，"grandfather"是指祖父或外祖父，而"96-year-old"是指这个人已经96岁了。

下面是一些例句，包括英文原文和中文翻译：

My 96-year-old grandfather still speaks Engpsh fluently. 我96岁的爷爷仍然流利地说英语。
My grandfather, who is 96 years old, is a retired Engpsh teacher. 我96岁的爷爷是一名退休的英语教师。
Despite his age, my 96-year-old grandfather is still very active and enjoys learning new things. 尽管他年纪大了，我96岁的爷爷仍然非常活跃，喜欢学习新东西。