って、本当なの

is it really true that...

→ って
phrase Uncommon #19,522
is it really true that... Informal conversational way to ask whether something you heard is true. The って introduces the information being questioned, and なの adds an explanatory or emphatic question tone.
JA: 来月引っ越すって、本当なの?
EN: Is it really true that you're moving next month?

今まで重い病気にかかったことがないって、本当なの

Is it true that you've never had a serious illness before?

ボストンに行くって、本当なの

Is it true that you're going to Boston?

トムお父さんが有名なって、本当なの

Is it true that Tom's father is famous?

アイルランドにはヘビ全然いないって、本当なの

Is it true that there are no snakes at all in Ireland?

トム殺人事件を目撃したって、本当なの

Is it true that Tom witnessed a murder?

これって、本当なの

Is this really true?

トムメアリーのこと嫌いだって、本当なの

Is it true that Tom hates Mary?

トム刑務所に入ってるって、本当なの

Is it true that Tom is in prison?

フランス語が話せないって、本当なの

Is it really true that you can't speak French?

トム一度もボストンに行ったことがないって、本当なの

Is it true that Tom has never been to Boston?