Acts may say little about it, but 1 Cor. 13:8 does state that the gift of tongues will cease.
However, it does not say when. (Some of the writings of the Ante-Nicean Fathers suggest that the gifts of prophesying and tongues had already ceased to be in their day; perhaps someone else would be in a position to give citations thereof. (?))
Glossolaia (claim to speak unknown tongues (spirit languages?) needing translation by another charimatic means) was an issue in Corinth as Paul seems to be struggling with how to manage the new blending of Mystery cult and Judaism he had been speading. For the moment forget Acts. Glossolaia was a part of the religion of the Corithians before becoming Christian. Some so called Mystery cults and the cult of Apollos included the practice and the new converts had clung to the charisma tradition. Paul seems to be trying to regulate it and capitalize on it. The actual practice was and is self induced and does not require any "spirit" involvement. Even today millions of former Baptists etc. who regularly spoke in tongues recognise they themselves were the source of what was at the time a very meaningful experience. Like so many matters of faith, self deception runs deep.
Acts says nothing about the Corithian style glossolaia. In the story of the first Pentecost the Christians miraculously knew foreign languages so as to spread the new faith. This was nothing more than an exciting origin legend. It was not claimed to have been repeated.
Everyone seems to have a certain opinion of what speaking in tongues is - like some sort of fast talking goobuldydok that sounds like a tv evangalist, slayed in the spirit, psuedo seizure activity.
Here's some speaking in a tongue - see if you can interpret.
From the upper room of a house, one is able to see further along the way, and notice the poor.