我爷爷对其他国家知之甚少的翻译：My Grandpa little is known on other countries 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I know little about other countries grandfather

My Grandpa little is known on other countries

My grandfather understands very little to other countries

My grandfather has very little knowledge of other countries

My Grandpa little is known on other countries