Questions & Answers about Fólkið á safninu talar hljóðlátt.
Because the subject fólkið is grammatically singular.
- tala = to speak
- talar = speaks / is speaking
So Icelandic uses the 3rd person singular verb form with fólkið:
- Fólkið talar = the people speak
This feels unusual to English speakers, because English uses a plural verb with people, but Icelandic is following the grammar of fólk, not the English translation.