Tongues are not the only sign of the Holy Spirit. there are many examples in the Bible of other ways, not just like in the book of Acts. Daniel and many other had the Holy Spirit and did not speak in tongues.
Daniel 4:7-9
New King James Version (NKJV)
7 Then the magicians, the astrologers, the Chaldeans, and the soothsayers came in, and I told them the dream; but they did not make known to me its interpretation. 8 But at last Daniel came before me (his name is Belteshazzar, according to the name of my god; in him is the Spirit of the Holy God), and I told the dream before him, saying: 9 “Belteshazzar, chief of the magicians, because I know that the Spirit of the Holy God is in you, and no secret troubles you, explain to me the visions of my dream that I have seen, and its interpretation.
Psalm 51
10 Create in me a clean heart, O God,
And renew a steadfast spirit within me.
11 Do not cast me away from Your presence,
And do not take Your Holy Spirit from me.
12 Restore to me the joy of Your salvation,
And uphold me by Your generous Spirit.
13 Then I will teach transgressors Your ways,
And sinners shall be converted to You.
14 Deliver me from the guilt of bloodshed, O God,
The God of my salvation,
And my tongue shall sing aloud of Your righteousness.
15 O Lord, open my lips,
And my mouth shall show forth Your praise.
16 For You do not desire sacrifice, or else I would give it;
You do not delight in burnt offering.
17 The sacrifices of God are a broken spirit,
A broken and a contrite heart—
These, O God, You will not despise.