英語版FF9日誌69 : Here's a chance to listen in on some conversation.

ガーネットが一般人の振る舞いを学ぼうと、アイテム屋の娘と会話するシーンです。

Shopkeeper Eve:

Welcome!

Dagger:

Um, yes, can we talk for a bit?

Shopkeeper Eve:

Talk?

Dagger:

Um...

Pasty Yacha:

Eve!!!

Shopkeeper Eve:

Yacha! Can't you see I'm with a customer?

Pasty Yacha:

But I just heard something awesome!

Dagger:

(Awesome?)

Shopkeeper Eve:

Can't you see I'm working?

Dagger:
Um, please... I mean, don't mind me.

( Here's a chance to listen in on some conversation.)

Pasty Yacha:

Thanks, lady! I was gonna say...

Here's a chance to listen in on some conversation.

listen in on～で「～に聞き耳を立てる、盗み聞きする」という意味です。

listen inが「盗聴する」、onが「～を、～について」を表現しています。