Add a docstring to `iso-transl-set-language'

* lisp/international/iso-transl.el: Document
`iso-transl-set-language' (bug#52261).
Copyright-paperwork-exempt: yes

1 files changed, 8 insertions, 0 deletions

diff --git a/lisp/international/iso-transl.el b/lisp/international/iso-transl.el
index 2d12d01d351..aea12179170 100644
--- a/lisp/international/iso-transl.el
+++ b/lisp/international/iso-transl.el
@@ -307,6 +307,14 @@ sequence VECTOR.  (VECTOR is normally one character long.)")
     (setq alist (cdr alist))))
 
 (defun iso-transl-set-language (lang)
+  "Set shorter key bindings for some characters relevant for LANG.
+This affects the `C-x 8' prefix.
+
+Note that only a few languages are supported, and for more
+rigorous support it is recommended to use an input method
+instead.  Also note that many of these characters can be input
+with the regular `C-x 8' map without having to specify a language
+here."
   (interactive (list (let ((completion-ignore-case t))
                        (completing-read "Set which language? "
                                         iso-transl-language-alist nil t))))