rozmówca in English:

I hand out my business cards only when my interlocutor ask for once

One interviewee failed to answer the question correctly.

I need two interviewees more.

If you can't go to an English-speaking country to study, perhaps you can find an English native speaker living nearby that can help you learn English.

You may not learn to speak as well as a native speaker, but you should be able to speak well enough that native speakers will understand what you have to say.

A child who is a native speaker usually knows many things about his or her language that a non-native speaker who has been studying for years still does not know and perhaps will never know.

I'm a non-native speaker of English and realize there is a lot that I still need to learn.

If you want to sound like a native speaker, you must be willing to practice saying the same sentence over and over in the same way that banjo players practice the same phrase over and over until they can play it correctly and at the desired tempo.

I think if I talked more often with a native speaker, my English skills would improve quickly.

Every student who has graduated from our university has studied English with a native speaker for at least two years.

He's a plain speaker.

And of course, a speaker usually communicates in two ways, orally as well as through gestures.

We need to distinguish what a sentence could mean from what it actually does mean when used by one particular speaker on one particular occasion.

I am delighted to welcome our guest speaker Holly, who is going to be offering some sales tips.

The speaker didn't know his subject, nor did he speak well; in short, he was disappointing.

To win his audience, the speaker resorted to using rhetorical techniques he learned from his communication courses.