The .tlk file is part of the CEP, but the CEP installer routine does not usually put it in the right place. If you've reinstalled your cep it may have sent that file to the wrong place.
If you are running Windows the place to start is your DOCUMENTS folder, inside you'll find the 'Neverwinter Nights' folder, within this you'll find a number of folders, including 'tlk' this is the folder you need to put the CEP's '.tlk' file into - you will likely find it in a nearby 'hak' folder which is where the CEP installer puts it by default.
Keep me posted on this matter, we'll get this working for you asap.
Be well. Game on.
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