en_tn_condensed/act/02/04.md

They were all filled with the Holy Spirit and

This can be stated in active form. Alternate translation: "The Holy Spirit filled all of those who were there and they" (See: rc://en/ta/man/jit/figs-activepassive)

speak in other tongues

They were speaking in languages that they did not already know.

as the Spirit gave them the ability

The Holy Spirit gave them the ability to speak; they were dependent on the Spirit to speak in different languages.