So I see it in my regional selections, but I cannot choose it to test.tts_engine="loquendo_7"
In looking over your dictionary.voice file, there is a lot of stuff in there that may no longer be applicable in NextGen. Many skin commands/additions.
Much of the diMka still works, totally not sure about the others. Specifically for NextGen, that file is more than twice as big as it needs to be. There could be some entries that are cancelling each other out. I could edit it, but then I could not test it. So I suggest you try the posted dictionary.voice sample I posted for 'translation' earlier in a copy of your voice file, and then see if the overspeed alert works as it should. If it does, you can add back in whatever you want from your original file that will not conflict.