diff --git a/lib/TMDB/Genre.pm b/lib/TMDB/Genre.pm
index 22a9e77..dd2d2e3 100644
--- a/lib/TMDB/Genre.pm
+++ b/lib/TMDB/Genre.pm
@@ -60,7 +60,7 @@ sub list {
             method => 'genre/list',
             params => {
                 language => $self->session->lang
-                ? $self->session->lang
+                ? substr($self->session->lang, 0, 2)
                 : undef,
             },
         }
diff --git a/lib/TMDB/Movie.pm b/lib/TMDB/Movie.pm
index 2ae8858..1ac0b92 100644
--- a/lib/TMDB/Movie.pm
+++ b/lib/TMDB/Movie.pm
@@ -124,7 +124,7 @@ sub crew {
 sub images {
     my $self   = shift;
     my $params = {};
-    $params->{lang} = $self->session->lang if $self->session->lang;
+    $params->{language} = substr($self->session->lang, 0, 2) if $self->session->lang;
   return $self->session->talk(
         {
             method => 'movie/' . $self->id() . '/images',
diff --git a/lib/TMDB/TV.pm b/lib/TMDB/TV.pm
index fa03d14..86c607f 100644
--- a/lib/TMDB/TV.pm
+++ b/lib/TMDB/TV.pm
@@ -128,7 +128,7 @@ sub crew {
 sub images {
     my $self   = shift;
     my $params = {};
-    $params->{lang} = $self->session->lang if $self->session->lang;
+    $params->{language} = substr($self->session->lang, 0, 2) if $self->session->lang;
   return $self->session->talk(
         {
             method => 'tv/' . $self->id() . '/images',
diff --git a/t/02-language.t b/t/02-language.t
new file mode 100644
index 0000000..2ce46e5
--- /dev/null
+++ b/t/02-language.t
@@ -0,0 +1,863 @@
+#!perl
+
+####################
+# LOAD CORE MODULES
+####################
+use strict;
+use warnings FATAL => 'all';
+use Test::More;
+use Test::MockObject;
+use TMDB;
+use HTTP::Tiny;
+
+# Autoflush ON
+local $| = 1;
+
+
+my $mock = Test::MockObject->new;
+$mock->set_isa('HTTP::Tiny');
+$mock->set_always( 
+    'get',
+    {   success => 1,
+        status => 200,
+        headers => {},
+        content => '{ "id": 1234, "results": [], "changes": [], "title": "blabla", "name": "blabla", "overview": "blabla blabla", "credits": { "cast": [], "crew": [] }}'
+    }
+);
+
+my $tmdb = TMDB->new( apikey => 'fake-api-key', lang => 'es-MX', client => $mock);
+
+my $show = $tmdb->tv(id => 1234);
+my ($name, $args, $url);
+
+# Tests language parameters for Session:talk requests
+my $session = $tmdb->{session};
+
+$mock->clear;
+$session->talk( { method => "test/path", params => { para1 => "v1", para2 => "v2" } } );
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $session->talk may be localized' );
+
+$mock->clear;
+$session->talk( { method => "test/path", params => { para1 => "v1", para2 => "v2", language => "fr" } } );
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=fr(&|$)/, 'Request $session->talk language parameter overrides default language' );
+
+# Tests language parameters for TV Show requests
+$mock->clear;
+$show->info;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->info may be localized' );
+
+$mock->clear;
+$show->similar(1);
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->similar may be localized' );
+
+$mock->clear;
+$show->season(1);
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->season(1) may be localized' );
+
+$mock->clear;
+$show->episode(1,2);
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->episode(1,2) may be localized' );
+
+$mock->clear;
+$show->cast;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->cast may be localized' );
+
+$mock->clear;
+$show->crew;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->crew may be localized' );
+
+$mock->clear;
+$show->images;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+# for images language value must be an ISO 639-1 (Aplha-2) language code 
+ok( $url =~ /(&|\?)language=es(&|$)/, 'Request $show->images may be localized' );
+
+$mock->clear;
+$show->videos;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->videos may be localized' );
+
+$mock->clear;
+$show->version;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->version may be localized' );
+
+$mock->clear;
+$show->_credits;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->_credits may be localized' );
+
+SKIP: {
+    skip "Requests that don't use language", 4;
+
+    $mock->clear;
+    $show->alternative_titles;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->alternative_titles may be localized' );
+
+    $mock->clear;
+    $show->translations;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->translations may be localized' );
+
+    $mock->clear;
+    $show->content_ratings;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->content_ratings may be localized' );
+
+    $mock->clear;
+    $show->keywords;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->keywords may be localized' );
+};
+
+SKIP: {
+    skip "Requests not implemented", 10;
+
+    $mock->clear;
+    $show->aggregate_credits;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->aggregate_credits may be localized' );
+
+    $mock->clear;
+    $show->changes;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->changes may be localized' );
+
+    $mock->clear;
+    $show->credits;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->credits may be localized' );
+
+    $mock->clear;
+    $show->episode_groups;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->episode_groups may be localized' );
+
+    $mock->clear;
+    $show->external_ids;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->external_ids may be localized' );
+
+    $mock->clear;
+    $show->recommendations;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->recommendations may be localized' );
+
+    $mock->clear;
+    $show->lists;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->lists may be localized' );
+
+    $mock->clear;
+    $show->reviews;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->reviews may be localized' );
+
+    $mock->clear;
+    $show->screened_theatrically;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->screened_theatrically may be localized' );
+
+    $mock->clear;
+    $show->watch_providers;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $show->watch_providers may be localized' );
+};
+
+# Tests language parameters for Movie requests
+my $movie = $tmdb->movie(id => 1234);
+
+$mock->clear;
+$movie->info;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->info may be localized' );
+
+$mock->clear;
+$movie->similar(1);
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->similar may be localized' );
+
+$mock->clear;
+$movie->lists(1);
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->lists may be localized' );
+
+$mock->clear;
+$movie->reviews(1);
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->reviews may be localized' );
+
+$mock->clear;
+$movie->title;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->title may be localized' );
+
+$mock->clear;
+$movie->year;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->year may be localized' );
+
+$mock->clear;
+$movie->tagline;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->tagline may be localized' );
+
+$mock->clear;
+$movie->overview;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->overview may be localized' );
+
+$mock->clear;
+$movie->imdb_id;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->imdb_id may be localized' );
+
+$mock->clear;
+$movie->description;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->description may be localized' );
+
+$mock->clear;
+$movie->collection;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->collection may be localized' );
+
+$mock->clear;
+$movie->genres;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->genres may be localized' );
+
+$mock->clear;
+$movie->homepage;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->homepage may be localized' );
+
+$mock->clear;
+$movie->studios;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->studios may be localized' );
+
+$mock->clear;
+$movie->poster;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->poster may be localized' );
+
+$mock->clear;
+$movie->backdrop;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->backdrop may be localized' );
+
+$mock->clear;
+$movie->cast;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->cast may be localized' );
+
+$mock->clear;
+$movie->crew;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->crew may be localized' );
+
+$mock->clear;
+$movie->images;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+# for images language value must be an ISO 639-1 (Aplha-2) language code 
+ok( $url =~ /(&|\?)language=es(&|$)/, 'Request $movie->images may be localized' );
+
+$mock->clear;
+$movie->trailers;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->trailers may be localized' );
+
+$mock->clear;
+$movie->version;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->version may be localized' );
+
+$mock->clear;
+$movie->actors;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->actors may be localized' );
+
+$mock->clear;
+$movie->director;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->director may be localized' );
+
+$mock->clear;
+$movie->producer;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->producer may be localized' );
+
+$mock->clear;
+$movie->executive_producer;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->executive_producer may be localized' );
+
+$mock->clear;
+$movie->writer;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->writer may be localized' );
+
+$mock->clear;
+$movie->posters;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+# for images language value must be an ISO 639-1 (Aplha-2) language code 
+ok( $url =~ /(&|\?)language=es(&|$)/, 'Request $movie->posters may be localized' );
+
+$mock->clear;
+$movie->backdrops;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+# for images language value must be an ISO 639-1 (Aplha-2) language code 
+ok( $url =~ /(&|\?)language=es(&|$)/, 'Request $movie->backdrops may be localized' );
+
+$mock->clear;
+$movie->trailers_youtube;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->trailers_youtube may be localized' );
+
+$mock->clear;
+$movie->_cast;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->_cast may be localized' );
+
+$mock->clear;
+$movie->_crew_names;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->_crew_names may be localized' );
+
+SKIP: {
+    skip "Requests that don't use language", 5;
+
+    $mock->clear;
+    $movie->alternative_titles;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->alternative_titles may be localized' );
+
+    $mock->clear;
+    $movie->changes;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->changes may be localized' );
+
+    $mock->clear;
+    $movie->keywords;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->keywords may be localized' );
+
+    $mock->clear;
+    $movie->releases;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->releases may be localized' );
+
+    $mock->clear;
+    $movie->translations;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->translations may be localized' );
+};
+
+SKIP: {
+    skip "Requests not implemented", 6;
+
+    $mock->clear;
+    $movie->credits;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->credits may be localized' );
+
+    $mock->clear;
+    $movie->external_ids;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->external_ids may be localized' );
+
+    $mock->clear;
+    $movie->recommendations;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->recommendations may be localized' );
+
+    $mock->clear;
+    $movie->release_dates;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->release_dates may be localized' );
+
+    $mock->clear;
+    $movie->videos;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->videos may be localized' );
+
+    $mock->clear;
+    $movie->watch_providers;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $movie->watch_providers may be localized' );
+};
+
+# Tests language parameters for Collection requests
+my $collection = $tmdb->collection(id => 1234);
+
+$mock->clear;
+$collection->info;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $collection->info may be localized' );
+
+$mock->clear;
+$collection->ids;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $collection->ids may be localized' );
+
+$mock->clear;
+$collection->titles;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $collection->titles may be localized' );
+
+$mock->clear;
+$collection->_parse_parts;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $collection->_parse_parts may be localized' );
+
+$mock->clear;
+$collection->version;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $collection->version may be localized' );
+
+SKIP: {
+    skip "Not implemented", 2;
+
+    $mock->clear;
+    $collection->images;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $collection->images may be localized' );
+
+    $mock->clear;
+    $collection->translations;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $collection->translations may be localized' );
+};
+
+# Tests language parameters for company requests
+my $company = $tmdb->company(id => 1234);
+
+SKIP: {
+    skip "Requests that don't use language", 6;
+
+    $mock->clear;
+    $company->info;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $company->info may be localized' );
+
+    $mock->clear;
+    $company->version;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $company->version may be localized' );
+
+    $mock->clear;
+    $company->movies;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $company->movies may be localized' );
+
+    $mock->clear;
+    $company->name;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $company->name may be localized' );
+
+    $mock->clear;
+    $company->logo;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $company->logo may be localized' );
+
+    $mock->clear;
+    $company->image;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $company->image may be localized' );
+};
+
+# Tests language parameters for Genre requests
+my $genre = $tmdb->genre(id => 1234);
+
+$mock->clear;
+$genre->list;    # localized by lang only
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+# Genre movie and tv list language parameter value must be an ISO 639-1 (Aplha-2) language code 
+ok( $url =~ /(&|\?)language=es(&|$)/, 'Request $genre->list may be localized' );
+
+$mock->clear;
+$genre->movies;  # localized by only
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $genre->movies may be localized' );
+
+# Tests language parameters for Configuration requests
+$mock->clear;
+my $configuration = $tmdb->config;
+
+SKIP: {
+    skip "Configuration creation don't use language", 1;
+
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Configuration creation may be localized' );
+};
+
+SKIP: {
+    skip "Requests not implemented", 5;
+
+    $mock->clear;
+    $configuration->countries;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $configuration->countries may be localized' );
+
+    $mock->clear;
+    $configuration->jobs;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $configuration->jobs may be localized' );
+
+    $mock->clear;
+    $configuration->languages;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $configuration->languages may be localized' );
+
+    $mock->clear;
+    $configuration->primary_translations;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $configuration->primary_translations may be localized' );
+
+    $mock->clear;
+    $configuration->timezones;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $configuration->timezones may be localized' );
+};
+
+# Tests language parameters for Person requests
+my $person = $tmdb->person(id => 1234);
+
+$mock->clear;
+$person->info;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->info may be localized' );
+
+$mock->clear;
+$person->version;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->version may be localized' );
+
+$mock->clear;
+$person->name;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->name may be localized' );
+
+$mock->clear;
+$person->aka;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->aka may be localized' );
+
+$mock->clear;
+$person->bio;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->bio may be localized' );
+
+$mock->clear;
+$person->image;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->image may be localized' );
+
+$mock->clear;
+$person->credits;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->credits may be localized' );
+
+$mock->clear;
+$person->starred_in;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->starred_in may be localized' );
+
+$mock->clear;
+$person->directed;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->directed may be localized' );
+
+$mock->clear;
+$person->produced;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->produced may be localized' );
+
+$mock->clear;
+$person->executive_produced;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->executive_produced may be localized' );
+
+$mock->clear;
+$person->wrote;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->wrote may be localized' );
+
+$mock->clear;
+$person->_crew_names;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->_crew_names may be localized' );
+
+SKIP: {
+    skip "Requests that don't use language", 1;
+
+    $mock->clear;
+    $person->images;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->images may be localized' );
+};
+
+SKIP: {
+    skip "Requests not implemented", 6;
+
+    $mock->clear;
+    $person->changes;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->changes may be localized' );
+
+    $mock->clear;
+    $person->combined_credits;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->combined_credits may be localized' );
+
+    $mock->clear;
+    $person->movie_credits;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->movie_credits may be localized' );
+
+    $mock->clear;
+    $person->tv_credits;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->tv_credits may be localized' );
+
+    $mock->clear;
+    $person->tagged_images;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->tagged_images may be localized' );
+
+    $mock->clear;
+    $person->translations;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $person->translations may be localized' );
+};
+
+# Tests language parameters for Person requests
+my $search = $tmdb->search();
+
+$mock->clear;
+$search->movie("Test");
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->movie may be localized' );
+
+$mock->clear;
+$search->tv("Test");
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->tv may be localized' );
+
+$mock->clear;
+$search->upcoming;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->upcoming may be localized' );
+
+$mock->clear;
+$search->now_playing;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->now_playing may be localized' );
+
+$mock->clear;
+$search->popular;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->popular may be localized' );
+
+$mock->clear;
+$search->popular_people;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->popular_people may be localized' );
+
+$mock->clear;
+$search->discover;
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->discover may be localized' );
+
+$mock->clear;
+$search->find( id =>"id", source => "source");
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->find may be localized' );
+
+$mock->clear;
+$search->person("Test");
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->person may be localized' );
+
+$mock->clear;
+$search->collection("Test");
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->collection may be localized' );
+
+$mock->clear;
+$search->list("Test");
+($name, $args) = $mock->next_call();
+$url = @$args[1];
+ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->list may be localized' );
+
+SKIP: {
+    skip "Requests that don't use language", 4;
+
+    $mock->clear;
+    $search->company("Test");
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->company may be localized' );
+
+    $mock->clear;
+    $search->keyword("Test");
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->keyword may be localized' );
+
+    $mock->clear;
+    $search->latest;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->latest may be localized' );
+
+    $mock->clear;
+    $search->latest_person;
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->latest_person may be localized' );
+};
+
+SKIP: {
+    skip "Requests not implemented", 1;
+
+    $mock->clear;
+    $search->multi("Test");
+    ($name, $args) = $mock->next_call();
+    $url = @$args[1];
+    ok( $url =~ /(&|\?)language=es-MX(&|$)/, 'Request $search->multi may be localized' );
+};
+
+
+# Done
+done_testing(125);
+exit 0;