diff --git a/src/runtime/stores/locale.ts b/src/runtime/stores/locale.ts
index 7888736..528ea6f 100644
--- a/src/runtime/stores/locale.ts
+++ b/src/runtime/stores/locale.ts
@@ -8,18 +8,6 @@ import { $isLoading } from './loading';
 let current: string;
 const $locale = writable(null);
 
-export function isFallbackLocale(localeA: string, localeB: string) {
-  return localeB.indexOf(localeA) === 0 && localeA !== localeB;
-}
-
-export function isRelatedLocale(localeA: string, localeB: string) {
-  return (
-    localeA === localeB ||
-    isFallbackLocale(localeA, localeB) ||
-    isFallbackLocale(localeB, localeA)
-  );
-}
-
 function getSubLocales(refLocale: string) {
   return refLocale
     .split('-')
diff --git a/test/runtime/includes/lookup.test.ts b/test/runtime/includes/lookup.test.ts
index e4cf6b7..02f69e4 100644
--- a/test/runtime/includes/lookup.test.ts
+++ b/test/runtime/includes/lookup.test.ts
@@ -25,12 +25,20 @@ test('gets a deep message of a locale dictionary', () => {
   expect(lookup('deep.field', 'en')).toBe('lastname');
 });
 
-test('gets a message from the fallback dictionary', () => {
+test('gets a message from a generic fallback dictionary', () => {
   addMessages('en', { field: 'name' });
 
   expect(lookup('field', 'en-US')).toBe('name');
 });
 
+test('gets a message from a specific fallback dictionary', () => {
+  init({ fallbackLocale: 'en-GB' });
+
+  addMessages('en-GB', { field: 'name' });
+
+  expect(lookup('field', 'en-AU')).toBe('name');
+});
+
 test('gets an array', () => {
   addMessages('en', {
     careers: [
@@ -92,11 +100,3 @@ test('clears a locale lookup cache when new messages are added', () => {
   addMessages('en', { field: 'name2' });
   expect(lookup('field', 'en')).toBe('name2');
 });
-
-test('fallback to fallback locale', () => {
-  init({ fallbackLocale: 'en-GB', initialLocale: 'en-AU' });
-
-  addMessages('en-GB', { field: 'name' });
-
-  expect(lookup('field', 'en-AU')).toBe('name');
-});
diff --git a/test/runtime/stores/locale.test.ts b/test/runtime/stores/locale.test.ts
index 2b973e9..05642c3 100644
--- a/test/runtime/stores/locale.test.ts
+++ b/test/runtime/stores/locale.test.ts
@@ -2,11 +2,9 @@ import { get } from 'svelte/store';
 
 import { lookup } from '../../../src/runtime/includes/lookup';
 import {
-  isFallbackLocale,
   getPossibleLocales,
   getCurrentLocale,
   $locale,
-  isRelatedLocale,
 } from '../../../src/runtime/stores/locale';
 import { getOptions, init } from '../../../src/runtime/configs';
 import { register, isLoading } from '../../../src/runtime';
@@ -22,20 +20,6 @@ test('sets and gets the fallback locale', () => {
   expect(getOptions().fallbackLocale).toBe('en');
 });
 
-test('checks if a locale is a fallback locale of another locale', () => {
-  expect(isFallbackLocale('en', 'en-US')).toBe(true);
-  expect(isFallbackLocale('en', 'en')).toBe(false);
-  expect(isFallbackLocale('it', 'en-US')).toBe(false);
-});
-
-test('checks if a locale is a related locale of another locale', () => {
-  expect(isRelatedLocale('en', 'en-US')).toBe(true);
-  expect(isRelatedLocale('pt-BR', 'pt')).toBe(true);
-  expect(isRelatedLocale('en', 'en')).toBe(true);
-  expect(isRelatedLocale('en', 'it-IT')).toBe(false);
-  expect(isRelatedLocale('en-US', 'it')).toBe(false);
-});
-
 test('gets all possible locales from a reference locale', () => {
   expect(getPossibleLocales('en-US')).toEqual(['en-US', 'en']);
   expect(getPossibleLocales('az-Cyrl-AZ')).toEqual([