Now if the external dictionary gets modified, how to update the Paratext wordlist?
For new words added to the external dictionary, you could redo the process, and the new words would show up as “uncertain” in the word list, and you could approve them.
But if a word was approved in the external dictionary but is no longer approved, I don’t know how to readily update the Paratext wordlist. If you were certain that there were no words approved in Paratext that are not included in the external dictionary, you could change the status of every word to incorrect or unknown, then redo the process.