Native Esperanto speakers

[5] Also notable are young Holocaust victim Petr Ginz,[6] whose drawing of the planet Earth as viewed from the Moon was carried aboard the Space Shuttle Columbia, and Daniel Bovet,[7] the recipient of the 1957 Nobel Prize in Physiology or Medicine.

For that reason, many parents consider it important to bring their children regularly to Esperanto conventions such as the annual "Renkontiĝo de Esperanto-familioj" (or "Esperantistaj familioj"; REF, since 1979).

In some cases this is due to interference from their other native language (the adstrate), but in others it appears to be an effect of acquisition.

[3] Lindstedt, on the other hand, referencing Bergen's study, contends that "it is difficult to find convincing examples of changes introduced by the process of nativisation.

All examples proposed seem rather to be due to (1) transfers from the children’s other native languages, (2) differences between the spoken and written register of Esperanto and, in some cases, (3) incomplete acquisition."