Are 'speak' and 'talk' different?
Often it doesn't matter, but there are some differences.
'Speak' can refer to the action itself.
I speak Spanish really well and I speak Russian badly.
'Speak' can refer to something more formal than 'talk'.
As a teacher, I spoke to my students in lessons
and then I talked to my friends afterwards.
'Talk' suggests that it's a conversation.
My friends always listen to me, not all my students did.
There are also some expressions where we use
one word rather than the other.
Like: speak out or talk rubbish.
The difference is very small
and often it doesn't matter which one you use
but remember:
Teachers and politicians speak to you,
friends and family talk to you
and you should speak out
if you think someone's talking rubbish.