"Parlez-vous anglais?"

Translation: Do you speak English?

[baral]

why this is wrong ?"you speak english"?

[CapK9]

Because this is a question and '"you speak english?" is an informal way to ask a question, so Duolingo doesn't accept it.

[thecatpetter]

Duo does accept informal answers for many problems I think.

[baral]

:)

[CapK9]

For me too. Now I don't know what's the real problem...

[Athena_Black]

It can also be - 'Tu parle anglais'

[Serrpah]

Tu parles anglais would be the correct way of saying it, since you need that -s when it's about you.

[AlexandraD800829]

is vous used for formal questioning' because vous is also for plural you

[GiannaBana3]

yes i doo