If you take the first "table" of char sequences and IPA glyphs in
the *Help* buffer from C-h I i p a RET and run it through a pipeline,
"perl -p -e 's/ +/_/g;s/\|/\\vert{}/g;s/_/ \| /g;s/^/\| /;s/$/ \ |/'" , you'll
have the right data.
Then if you put that into an org-mode buffer and cause the "special symbols" like \vert to be displayed, type C-c C-x \.
Now if you position to the 1st cell in the table and start typing TAB as the cursor moves through the table, I believe you will see strange results.
I'm including a file with the output of the pipeline
Thanks,
Bruce