Do you mind explaining what this is all about? You'll find I understand English like a native.

6 seconds sound clip from the The Moon's Our Home (1941) classic radio play.

You can hear this line at 00:06:55 in the radio play.

Quote context

[...]

- All that about falling in love with a man you don't know, and who doesn't know you. Oh, that's romance!

- But not for you, darling. If I know you, he'll have to be...

- What's the matter?

- This telegram! It's... Hilda! Hilda, quick! Boyce, call the railroad station, get reservations to New York!

- Hilda, go home and pack everything! Everything! We're leaving for New York! Ohhhhh!

- Don't stand there as if you were painted on the wall! Do something!

- Do you mind explaining what this is all about? You'll find I understand English like a native.

- It's Granny! It's my own darling grandmother! She's ill. Maybe she's dying. Oh, I've got to get to her right away! Hilda, hurry! It's Granny!

- Lucy Van Steedan. Hot or cold, she gets her way.

- Ok, please, please. I can't sign all your books. I'd like to, but really I haven't time.

- Conductor, we should have left five minutes ago. What's holding this train?

[...]