"Próbuję rozmawiać!"

Translation: I am trying to talk!

[daylamay2]

Seems like the verb 'to try' is similar in many languages

[kjettern]

This one will come in handy in conversation with my future Polish wife.

[Neil395069]

You can try, but you won't succeed. Trust me :D

[Walkinthedog]

The boss would like to speak to you, speak slowly, I can't understand you when you speak Polish etc.
I believe it's more formal than talk here.

[Matthew_Phelps]

Yes it can be used formally but also very informally:

• "Son, speak up!"
• "Hey!!! Who spoke?? I heard you.."
• "Speak here into the mic"

[Walkinthedog]

I am trying to speak would also fit the bill as it is more often used talk.

[Jellei]

It's accepted.

Is 'speak' used often for having a conversation?

[Matthew_Phelps]

Yes. I would in fact label it just as common as "talk" in this context. For example, if you're really irritated with somebody:

"AHEM, who told you you could speak?? I'm trying to talk here and no one is letting me!"

[Marcuslawsk]

But its 'rozmawiać', not 'mówić'; so its more like 'I'm trying to talk to you, stop walking away' than 'Im trying to speak, please be quiet'. The sentence speaker wants to have a two way conversation, if i understand correctly, not simply to say something.

[Jellei]

Two-way conversation - sure, but my first interpretation would be that I am trying to speak to X, while Y is being loud and interrupts me, so I'm saying this line to Y.

I think that if it was the "stop walking away" interpretation, I'd say "Próbuję porozmawiać" (I'm trying to have a talk?) or even "Chcę porozmawiać". This "po-" prefix is hard to explain, but it goes in the direction of 'to do a bit of something'.

[Walkinthedog]

I hear you speaking and I concur. Talk about getting confused if you don't speak English, when you wish to talk to someone who does/

[Walkinthedog]

That's any married man when his sister in law comes to visit his wife. An exercise in futility.