Hola CrOTaliTo,
(I have been a bit busy on other things these last couple of days... so I will have to catch up with all the new posts...)
You should check from the beginning of the thread, and clear anything confusing...
The correct Spanish is "Se me
traba la
lengua". With the "spoonerism" the second syllable goes where the first is, so it becomes "Se me
lengua la
traba". Then it becomes like a children's play...