You do not have to speak in tongues to be saved.
An interesting question and an interesting answer, Paul the apostle says something about it:
1 Corinthians 14:12 So it is with you. Since you are eager for gifts of the Spirit, try to excel in those that build up the church.
18 I thank God that I speak in tongues more than all of you. 19 But in the church I would rather speak five intelligible words to instruct others than ten thousand words in a tongue.
20 Brothers and sisters, stop thinking like children. In regard to evil be infants, but in your thinking be adults. 21 In the Law it is written:
“With other tongues
and through the lips of foreigners
I will speak to this people,
but even then they will not listen to me,
says the Lord.”
And here is Isaiah that Paul mentions:
Isaiah 28:11 For with stammering lips and another tongue
He will speak to this people,
12 To whom He said, “This is the rest with which
You may cause the weary to rest,”
And, “This is the refreshing”;
Yet they would not hear.
I add two more verses:
Matthew 7:21 “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven. 22 Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles?’ 23 Then I will tell them plainly, ‘I never knew you. Away from me, you evildoers!’
1 Corinthians 13
1 If I speak in the tongues of men or of angels, but do not have love, I am only a resounding gong or a clanging cymbal.
8 Love never fails. But where there are prophecies, they will cease; where there are tongues, they will be stilled; where there is knowledge, it will pass away. 9 For we know in part and we prophesy in part, 10 but when completeness comes, what is in part disappears.