11. What is your mother tongue12. Are you fluent in Russian?13. Indicate other language which you speak fluently ________

9. Language proficiency
Language proficiency means an ability to speak, read and write, or only to speak a given language.

Question 9.1. Do you know the Russian language?
"Yes" should indicate those who know Russian.
"No" should indicate those who do not know Russian.

Question 9.2. What other languages do you know?
Each box is intended for one language only. The first box is for the mother tongue of the respondent. Therefore, you need to ask "What is your mother tongue?"
If a respondent says that his/her mother tongue is Russian, it should not be mentioned in the answer to question 9.2., but in the "Reserve" field in the bottom of the census form you must put the "Yes" mark. If, apart from the Russian language, a respondent knows other languages, they should be indicated in the available boxes.
If the mother tongue is not Russian, it should be identified in the first box. In the remaining two boxes you will indicate other languages the respondent knows.
If a respondent knows more languages than the available number of boxes, indicate the languages of his/her own choice. If a respondent finds difficulty in choosing the languages to be recorded, preference should be given to the national languages of the Russian Federation and indigenous languages of the CIS member-states. If a respondent lives on the territory of a republic (autonomous region or area), preference should be given to the state language of that territory.
Mark "No" in each line for those does not know other languages, and for children yet unable to talk.
Do not complete the field for digits located after the entry of the language made in writing