Hello again!
I'm still trying to customize the Advanced Search.
Now I need to add a language to the language search field. For some reason, it doesn't show Esperanto ("epo" according to ISO-639-2).

Taking a look at file /usr/share/koha/opac/htdocs/opac-tmpl/bootstrap/en/modules/opac-advsearch.tt, which seems to govern Advanced Search interface, I find this:

<fieldset>
  <legend>Language</legend>
    <!-- LANGUAGE LIMIT -->
      <p>
         <label for="language-limit">Language: </label>
         <select id="language-limit" name="limit">
                <option value="">No limit</option>
[% FOREACH search_languages_loo IN search_languages_loop %] [% IF ( search_languages_loo.selected ) %] <option value="ln,rtrn:[% search_languages_loo.iso639_2_code %]" selected="selected">[% search_languages_loo.language_description %]</option>
                                                [% ELSE %]
<option value="ln,rtrn:[% search_languages_loo.iso639_2_code %]">[% search_languages_loo.language_description %]</option>
                     [% END %]
                                            [% END %]
          </select>
       </p>
     <!-- /LANGUAGE LIMIT -->
</fieldset>

So, what should I do to add a language and its description to the list, or at least to take a look at the built-in list "search_languages_loop"?

Also, is there any way of writing code to select "any language but X"?

Rubén
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