As a kid I used to love speaking in my "foreign language." I didn't know what it was, but it was nice, and I used to like singing in it too. It was a game to me...but it came after an understanding and decision, as a child, that Jesus loved me and I loved Jesus.
And that was decades before encountering TWI.
There are many times when I have talked with people and, without knowing anything of their situations, have said something that they've said was "just what they needed to hear." Is that a WoK, a word of prophecy, what? I don't know, I only know that as my heart is to help and serve others, I believe God can give me words that others need - to encourage, to strengthen, to help.
I agree with Steve's thoughts on this.
Don't know if any of what TWI taught is correct. As it was so performance-based (works), especially in the Intermediate class, it was probably all stuff and nonsense.
I know that if I did anything like that (SIT and interpretation) in any church I've been to since TWI (not that there are many of those) I would get, at the very least, some raised eyebrows. At the church I've been attending, they are open to people with a "word" about current situations, a Bible verse to share, or a "picture" that seems to relate to something that the church is considering. The "picture" is usually "interpreted" or explained by the person "seeing" the "picture." And sometimes, there is a quiet bit at the end of some songs where people spontaneously start singing softly in tongues. The noise so made actually sounds quite pleasant but I find it quite freaky - guess that is something from TWI that I still need to deal with. While they're happy with the same person "interpreting" a "picture," if it came to interpreting tongues, they would definitely expect an "interpreter" (different person) to be present rather than delivery by the same person.
But then again, perhaps that's as far as that church's understanding goes... God always has more that he wants us to know.