I don't see Acts 2:38 saying that...
Let me show you..
Peter preached, under the anointing of the Holy Spirit.. in Acts 2 (Pentecost).
All those in the Upper Room , including Peter, had received a Gift of the Spirit.
That is Acts 2 :2-3-4
In verse 6, you read that people who were of other languages.. "Heard".... the gift of the Spirit (tongues) that were coming from all those in Acts 2 2-4.
They said this...
....................7 And they were all amazed and marvelled, saying one to another, Behold, are not all these which speak Galilaeans?
8 And how hear we every man in our own tongue, wherein we were born?
9 Parthians, and Medes, and Elamites, and the dwellers in Mesopotamia, and in Judaea, and Cappadocia, in Pontus, and Asia,
10 Phrygia, and Pamphylia, in Egypt, and in the parts of Libya about Cyrene, and strangers of Rome, Jews and proselytes,
11 Cretes and Arabians, we do hear them speak in our tongues the wonderful works of God....................
So, these are the same who heard Peter preach .... So, Acts 2:38 is the resolution, more or less, of Peter's entire message give in "tongues" that they could understand.