On the day of Pentecost tongues was understood.
What did Paul say about tongues that were not understood?Paul wrote in
Cor. 14: 1: Follow after charity, and desire spiritual gifts,
but rather that ye may prophesy.2: For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.3:
But he that prophesieth speaketh unto men to edification, and exhortation, and comfort.4: He that speaketh in an unknown tongue edifieth himself;
but he that prophesieth edifieth the church.5: I would that ye all spake with tongues, but rather that ye prophesied: for greater is he that prophesieth than he that speaketh with tongues, except he interpret, that the church may receive edifying