I don't think they can be faked. Yet, I think the larger question should be "to what benefit?"
If the speaking in tongues benefits only the one, or ones speaking on the individual level? Inasmuch as it causes those ones to continue believing? Then, it would appear the Holy Spirit is doing that which it was sent to do.
It would then seem, the responsibility/duty/obligation of the earnestly coveting of the best gifts (1 Corinthians 12:31), would/should fall upon those that do the speaking in tongues. Especially, should the one/s speaking in tongues be asking the Lord of the Harvest to send forth more laborers into His harvest!(Matthew 9:38/Luke 10:2)
Of the which, is a 2-edged prayer/request/asking of! A?, for the unbelievers, and B?, and to me? (and others it would seem), more importantly? the best gifts!
So, for a surety? NONE of us believers want this:
Romans 11:
22 Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.
In our coveting earnestly the best gifts? We should, as "lively stones" be doing these things!
1 Peter 2:5
Ye also, as lively stones, are built up a spiritual house, an holy priesthood, to offer up spiritual sacrifices, acceptable TO God BY Jesus Christ.
As far as I know? I myself, don't speak in tongues. Or? If I do? I don't know that I am!
Which begs the question of these best gifts.
Are these gifts also in an unknown tongue, or language?