I am saying you are not rightly dividing the word of truth because Paul set the precedent for what tongues are for in 1 Corinthians 12th chapter and it cannot be for private use as you all seem to think in between the lines in chapter 14..
1 Corinthians 12:7 But the manifestation of the Spirit is given
to every man to profit withal:
The gifts are to profit the assembly, not individual.
11 But all these worketh that one and the selfsame Spirit, dividing to every man severally as he will. 12 For as the body is one, and hath many members, and all the members of that one body, being many, are one body: so also is Christ.
13 For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit. 14 For the body is not one member, but many.
There is only one drink of the One Spirit that we all have been baptized by for why no other baptism with the Holy Ghost is needed to get any gift of the Spirit, let alone tongues.
19 And if they were all one member, where were the body? 20 But now are they many members, yet but one body.
21 And the eye cannot say unto the hand, I have no need of thee: nor again the head to the feet, I have no need of you.
To say tongues are for private use is a believer telling all the members of the body that you do not need them as you can use tongues for private use for so many benefits that it needs no interpretation & yet Paul prayed that someone would interpret that tongue in the assembly so he would understand it to actually benefit from that tongue.
But if you do not want to believe that, but believe that tongue and that phenomenon by how you got that tongue to be of God, I'll just pray for you.