diff --git a/CHANGELOG.md b/CHANGELOG.md
index e015365..2c4c067 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# Unreleased
+
+Enables extra plural rules to be used outside of Rails Translation Manager
+
 # 1.5.2
 
 Add missing plurals for Gujarati and Yiddish https://github.com/alphagov/rails_translation_manager/pull/44
diff --git a/config/locales/plurals.rb b/config/locales/plurals.rb
deleted file mode 100644
index 80996c1..0000000
--- a/config/locales/plurals.rb
+++ /dev/null
@@ -1,64 +0,0 @@
-# frozen_string_literal: true
-
-{
-  # Welsh
-  cy: { i18n: { plural: { keys: %i[zero one two few many other],
-                          rule:
-                            lambda do |n|
-                              case n
-                              when 0 then :zero
-                              when 1 then :one
-                              when 2 then :two
-                              when 3 then :few
-                              when 6 then :many
-                              else :other
-                              end
-                            end } } },
-  # Dari - this isn't an iso code. Probably should be 'prs' as per ISO 639-3.
-  dr: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Latin America and Caribbean Spanish
-  "es-419": { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Gujarati
-  gu: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
-  # Scottish Gaelic
-  gd: { i18n: { plural: { keys: %i[one two few other],
-                          rule: lambda do |n|
-                            if [1, 11].include?(n)
-                              :one
-                            elsif [2, 12].include?(n)
-                              :two
-                            elsif [3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 18, 19].include?(n)
-                              :few
-                            else
-                              :other
-                            end
-                          end } } },
-  # Armenian
-  hy: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
-  # Kazakh
-  kk: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Pashto
-  ps: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Punjabi Shahmukhi
-  "pa-pk": { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
-  # Sinhalese
-  si: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
-  # Somali
-  so: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Albanian
-  sq: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Norwegian
-  no: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Tamil
-  ta: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Turkmen
-  tk: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Uzbek
-  uz: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
-  # Yiddish
-  yi: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
-  # Chinese Hong Kong
-  'zh-hk' => { i18n: { plural: { keys: %i[other], rule: -> { :other } } } },
-  # Chinese Taiwan
-  'zh-tw' => { i18n: { plural: { keys: %i[other], rule: -> { :other } } } }
-}
diff --git a/lib/rails_translation_manager.rb b/lib/rails_translation_manager.rb
index 9100c13..7efc77c 100644
--- a/lib/rails_translation_manager.rb
+++ b/lib/rails_translation_manager.rb
@@ -18,14 +18,14 @@
 require "rails_translation_manager/cleaner"
 require "rails_translation_manager/exporter"
 require "rails_translation_manager/importer"
+require "rails_translation_manager/plurals"
 
 module RailsTranslationManager
   rails_i18n_path = Gem::Specification.find_by_name("rails-i18n").gem_dir
-  rails_translation_manager = Gem::Specification.find_by_name("rails_translation_manager").gem_dir
 
   I18n.load_path.concat(
     Dir["#{rails_i18n_path}/rails/pluralization/*.rb"],
-    ["#{rails_translation_manager}/config/locales/plurals.rb"]
+    ["lib/rails_translation_manager/plurals.rb"]
   )
 
   def self.locale_root
diff --git a/lib/rails_translation_manager/plurals.rb b/lib/rails_translation_manager/plurals.rb
new file mode 100644
index 0000000..0f0d5c9
--- /dev/null
+++ b/lib/rails_translation_manager/plurals.rb
@@ -0,0 +1,72 @@
+# frozen_string_literal: true
+
+module RailsTranslationManager
+  class Plurals
+    def self.extra_rules
+      {
+        # Welsh
+        cy: { i18n: { plural: { keys: %i[zero one two few many other],
+                                rule:
+                                  lambda do |n|
+                                    case n
+                                    when 0 then :zero
+                                    when 1 then :one
+                                    when 2 then :two
+                                    when 3 then :few
+                                    when 6 then :many
+                                    else :other
+                                    end
+                                  end } } },
+        # Dari - this isn't an iso code. Probably should be 'prs' as per ISO 639-3.
+        dr: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Latin America and Caribbean Spanish
+        "es-419": { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Gujarati
+        gu: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
+        # Scottish Gaelic
+        gd: { i18n: { plural: { keys: %i[one two few other],
+                                rule: lambda do |n|
+                                  if [1, 11].include?(n)
+                                    :one
+                                  elsif [2, 12].include?(n)
+                                    :two
+                                  elsif [3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 18, 19].include?(n)
+                                    :few
+                                  else
+                                    :other
+                                  end
+                                end } } },
+        # Armenian
+        hy: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
+        # Kazakh
+        kk: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Pashto
+        ps: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Punjabi Shahmukhi
+        "pa-pk": { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
+        # Sinhalese
+        si: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
+        # Somali
+        so: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Albanian
+        sq: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Norwegian
+        no: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Tamil
+        ta: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Turkmen
+        tk: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Uzbek
+        uz: { i18n: { plural: { keys: %i[one other], rule: ->(n) { n == 1 ? :one : :other } } } },
+        # Yiddish
+        yi: { i18n: { plural: { keys: %i[one other], rule: ->(n) { [0, 1].include?(n) ? :one : :other } } } },
+        # Chinese Hong Kong
+        'zh-hk' => { i18n: { plural: { keys: %i[other], rule: -> { :other } } } },
+        # Chinese Taiwan
+        'zh-tw' => { i18n: { plural: { keys: %i[other], rule: -> { :other } } } }
+      }
+    end
+  end
+end
+
+RailsTranslationManager::Plurals.extra_rules