Learn English – word for a person that other people listen to

Xophone (Anglophone, Francophone, &c.) is used by people who require such things; but these terms are not in ordinary parlance. It appears that even the most anxious Nativists don't use it: a search of U.S.English.org, which bills itself as "the nation's oldest and largest non-partisan citizens' action group dedicated to preserving the unifying role of the English language in the United States" doesn't yield a single hit on Anglophone.

We employ the adjective "English-speaking", and if pushed we'll call ourselves "English speakers"; but the fact is rather taken for granted than proclaimed as a point of pride. No doubt it's a sign of Anglophonic arrogance, but "being a native speaker of" English doesn't seem to need a label, at least to those who might bear it.

The word is childless.

This is neither positive nor negative in tone, and does not imply whether the couple remains without children by choice or by some other circumstance (e.g. one partner might be sterile.)