Sometimes you don’t want to define a new label environment or macro, but
just change the information associated with a label category. Maybe you
want to add some magic words, for another language. Changing only the
information associated with a label category is done by giving
nil
for the environment name and then specify the items you want
to define. Here is an example which adds German magic words to all
predefined label categories.
(setq reftex-label-alist '((nil ?s nil nil nil ("Kapitel" "Kap." "Abschnitt" "Teil")) (nil ?e nil nil nil ("Gleichung" "Gl.")) (nil ?t nil nil nil ("Tabelle")) (nil ?f nil nil nil ("Figur" "Abbildung" "Abb.")) (nil ?n nil nil nil ("Anmerkung" "Anm.")) (nil ?i nil nil nil ("Punkt"))))