switch ( $case ) {
case 'genitive':
// 1st and 2nd declension singular only.
- $in = array( '/a$/', '/u[ms]$/' );
- $out = array( 'ae', 'i' );
+ $in = array( '/a$/', '/u[ms]$/', '/tio$/' );
+ $out = array( 'ae', 'i', 'tionis' );
return preg_replace( $in, $out, $word );
default:
return $word;