For peopled aged 5+ only.
20. In what language did (the person) learn to speak?
P20. In what language did (the person) learn to speak?
This Question refers to language in which the respondent learned to speak in childhood, regardless of being or not able to speak it now.
For example, Mr. Antônio learned to speak in Echwabo. So, the right response is Echwabo, regardless of being or not able to speak other languages.
There should be only one response.