Minister of Education and Research Kristina Kallas sent a new proposal on Wednesday.
Currently, only one native language can be marked in the population register.
Kätlin Kõverik, advisor at the Ministry of Education, says the change is necessary.
In Estonia, there are increasingly more children and adults with two native languages.
Data is collected through censuses, but these take place every ten years.
Schools already collect data on children's language skills, but these should be consolidated in one place.
Currently, there may be confusion about where the data comes from.
In addition, the population register would allow specifying one's nationality.
Chancellor of Justice Ülle Madise says there are cases in Estonia where a child grows up speaking Estonian, even though the parents are of different nationalities.
A young person may want to mark that their native language is Estonian.
Kätlin Kõverik says that information technology is needed to implement the change.
Development work is costly, and resources need to be found.
The Ministry of the Interior has not yet taken a position on the minister of education's letter.
Previous estimates say development work could be completed within a year.
Chancellor of Justice Madise says the Ministry of the Interior is updating the population register.