You can export word lists to a text file (.txt) and then import that list of words into a user dictionary in InDesign. The words in the text file must be separated by a space, tab, or paragraph return. You can export added words and removed words, but you cannot export ignored words, which are used only in the current session.
The list of words is saved in a text file. You can edit this list of words in any text editor, and then import the word list. You can also send the word list to others, who can import it into their user dictionaries.