Patrons of type 'I' (institution) automatically get their sex/gender set to 'N' (which is short for "None"), but the 'N' is not translatable and actually shows up in the patron details page. Relevant code in memberentrygen.tt: [% IF ( I ) %]<input type="hidden" name="sex" value="N" />[% END %] The template code for showing the gender text should be unified into single included file, instead of spread over multiple places like: koha-tmpl/intranet-tmpl/prog/en/modules/members/moremember.tt: [% IF ( patron.sex == 'F' ) %]Female[% ELSIF ( patron.sex == 'M' ) %]Male[% ELSE %][% patron.sex | html %][% END %] koha-tmpl/intranet-tmpl/prog/en/modules/members/moremember-brief.tt: [% IF ( patron.sex ) %]<li><span class="label">Gender:</span>[% IF ( patron.sex == 'F' ) %]Female[% ELSIF ( patron.sex == 'M' ) %]Male[% ELSE %][% patron.sex | html %][% END %]</li>[% END %]