The best answer IMHO is one does not have to speak in tongues.

But, when one receives the Holy Ghost they will speak in tongues. This was and is the Biblical confirmation that one has received the Holy Ghost.

Acts 10:44-46

44 While Peter yet spake these words, the Holy Ghost fell on all them which heard the word.

45 And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost.

46 For they heard them speak with tongues, and magnify God. Then answered Peter,
KJV

Acts 19:6

6 And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied.
KJV