# first.items[].content
However, the data are not flawless. The Finnish population register data only records the self-reported first language, thus data on bi- and multilingualism is missing. This reduces linguistic diversity to slightly lower levels than it actually is.

# first.items[].contentMap.en
However, the data are not flawless. The Finnish population register data only records the self-reported first language, thus data on bi- and multilingualism is missing. This reduces linguistic diversity to slightly lower levels than it actually is.