This is the 12406th most frequent Polish word.
mówiło
"Was saying" or "was speaking."
In this sentence, 'mówiło' is used as a neutral impersonal form to convey that a topic was discussed or mentioned generally, without specifying who was the speaker.
Wczoraj mówiło się o zmianach w polityce.
Yesterday, there was talk about changes in politics.
Here, 'mówiło' is used to indicate that the subject (the child) repeatedly said things in the past, emphasizing direct speech or behaviour.
Dziecko mówiło śmieszne rzeczy podczas zabawy.
The child was saying funny things during the play.
In this example, 'mówiło' is again used impersonally to suggest that the notion or statement was being repeated in general discourse or consensus.