Editing Native Esperanto speakers (section)

==Word derivation==
{{see also|Esperanto vocabulary}}
Native-speaking children, especially at a young age, may coin words that do not exist in the speech of their parents, often for concepts for which Esperanto has a word they do not yet know, by exploiting the morphology of the language.  This is analogous to what adult speakers do for concepts where Esperanto lacks a word, and indicates that some of the grammatical alterations that adult learners may find difficult come easily to native-speaking children.  For example,<ref name=Corsetti>Corsetti, Pinto, & Tolomeo (2004) "[http://www.ingentaconnect.com/content/jbp/lplp/2004/00000028/00000003/art00003 Regularizing the regular]: The phenomenon of overregularization in Esperanto-speaking children", ''Language Problems & Language Planning,'' 28:3, pp. 261–282</ref>

*Antonyms in ''mal-''
:The prefix ''mal-'' is extremely productive, and children extend it beyond the usage they hear:
::''malmiksi'' 'to separate' (''miksi'' to mix)
::''malpluvi'' 'to stop raining' (''pluvi'' to rain)
::''malscias'' 'is ignorant of' (''scias'' knows)
::''malnuna'' 'past' (''nuna'' present)
::''malfari'' 'to break (un-make)' (''fari'' to make)
::''maltie'' 'here' (''tie'' there)
::''malstartas'' 'turn off (an engine)' (''startas'' 'starts', standard Esperanto ''ŝaltas'' 'switches on')
::''malĝustigis'' 'broke' (''ĝustigis'' repaired, made right)
::''malsandviĉiĝis'' 'became (a shape) which isn't a sandwich anymore' (''sandviĉ-iĝis'' 'became a sandwich', of a brother playing with cushions)
::''malstelita'' 'not surrounded by stars' (of the moon; from ''stelita'' 'starred')
::''malmateno'' 'evening' (''mateno'' morning)
::''malio'' 'nothing' (''io'' 'something'; standard Esperanto ''nenio'' 'nothing')
::''malinterne'' 'externally' (''interne'' internally)
::''malgraveda'' 'no longer pregnant' (''graveda'' pregnant)

*Containers in ''-ujo''
::''elektrujo'' 'a battery' (''elektro'' electricity)

*Tendencies in ''-ema''
::''ventrema'' 'fat' (tending to belly-ness, from ''ventro'' 'belly')

*Places in ''-ejo''
::''triciklejo'' 'a place for tricycles'

*Feminine in ''-ino''
::''penisino'' 'vagina' (''peniso'' penis)

*Instrument in ''-ilo''
::''maltajpilo'' 'delete key' (''maltajpi'' to delete, un-type, from ''tajpi'' to type)

*Verbs from nouns
::''nazas'' 'rubs noses' (''nazo'' nose)
::''buŝas'' 'kisses on the mouth' (''buŝo'' mouth)
::''langeti'' 'to give a little lick' (diminutive, from ''lango'' tongue)
::''dentumado'' 'activity with teeth' (''dento'' tooth, ''-umi'' doing something undefined with, ''-ado'' noun of action)
::''kuvi'' 'to have a bath' (''kuvo'' 'tub'; standard Esperanto ''bani sin'' 'to bathe oneself')
::''mukis'' '(my nose) was running' (''muko'' 'snot', by analogy with ''sangis'' 'bled', from ''sango'' 'blood')
::''literiĝas'' 'the letters are changing' ([[middle voice]], from ''litero'' 'letter (of the alphabet)')
::''ne seĝu sur la divano'' 'don't sit on the couch' (''seĝo'' 'chair'; standard Esperanto ''sidu'' 'sit')
::''muzi'' 'to museum' (from ''muzeo'' 'museum', misunderstood as ''muz-ejo'' 'a place for museuming')

*Verbs from adjectives
::''belos'' 'will be beautiful' (''bela'' 'beautiful'; found in poetry, but not usual in adult speech)
::''samante kiel mi'' 'being the same as me (you ...)' (''sama'' same)

*Adjectives from verbs
::''rida'' '(often) laughing' (''ridi'' 'to laugh'; standard Esperanto ''ridema'')

*Adjectives from nouns
::''ventuma'' 'making a breeze' (from ''ventum-ilo'' 'a fan')

*Compounds with prepositions
::''perblove'' 'by blowing' (''per'' 'via', ''blovi'' 'to blow')
::''mi superruliĝos vin'' 'I will roll over you' (an intransitive verb ending in ''-iĝos'' won't normally take an object in the accusative case, but here it is necessary because the preposition ''super'' 'over' has been moved to the verb ''rul'' 'roll'.  Without the suffix ''-iĝos'', however, the meaning would be a transitive 'I will roll you over'.)

*Adverbs from verbs
::''Ege halte, ege paŭze, ege salte'' 'very stoppingly, very pausingly, very jumpily'

*Adverbs from nouns and prepositions
::''Ene estas akve'' 'inside is wet' (''akvo'' 'water'; standard Esperanto is ''malseke'', an adverb being required because no specific thing is wet.)

*Nouns from adjectives
::''ludeblo'' 'the possibility of playing' (''ludi'' to play, ''-ebla'' -able)