[...] adult native English speakers, whose vocabulary size, according to Golden et al. (1990), is around 20,000 word families, excluding proper names, compound words, abbreviations and foreign words.
https://files.eric.ed.gov/fulltext/EJ903880.pdf
#English #vocabulary #learning #sona_nimi #kama_sona #Inli
#size #suli #jan_Sonko #ma_Sina