Can we say with certainty that all those who have never spoken in tongues have never been baptized in the Holy Spirit? Personally, I don’t think so.
I’ve always encouraged people to expect to speak in tongues when I’ve prayed for them to be baptized in the Holy Spirit, and probably 95% of them have within seconds of my praying for them. It would amount to thousands of people over the years.
I would never say, however, that a Christian who has prayed to be baptized in the Spirit and who hasn’t spoken in tongues is not baptized in the Holy Spirit, because the Spirit baptism is received by faith and speaking in tongues is voluntary. If I have an opportunity, however, to share with a believer who has prayed to be baptized in the Spirit but who has never spoken in tongues, I first show that person all the scriptures in the book of Acts on the subject. Then I also show that believer how Paul wrote that he was in control of when he spoke or did not speak in tongues. Like Paul, I can speak in tongues any time I desire, and thus I could decide, if I desired, to never speak in tongues again. That being so, I could conceivably have been baptized in the Holy Spirit and never spoken in tongues in the first place by not cooperating with the Spirit’s utterance.
So again, when I have the opportunity to share with a Christian who has prayed in faith for the baptism in the Holy Spirit but who has never spoken in tongues, I don’t tell him (nor do I believe) that he isn’t baptized in the Holy Spirit. I simply explain to him how speaking in tongues is not something that the Holy Spirit does apart from us. I explain that the Holy Spirit gives the utterance, but that we must do the speaking, just as when one speaks in his known language. Then I encourage that person to cooperate with the Holy Spirit and begin to speak in tongues. Almost without exception, all of them soon do.