diff --git a/imports/api/Utility/server/files.js b/imports/api/Utility/server/files.js
index ceb0fc9..717f19f 100644
--- a/imports/api/Utility/server/files.js
+++ b/imports/api/Utility/server/files.js
@@ -1,16 +1,8 @@
 import fs from 'fs';
+import getFallbackLang from '/imports/startup/server/accounts/lang-fallback';
 
 const as = f => `assets/app/${f}`;
 
-export const getFallbackLang = (lang) => {
-  if (lang === 'ast' || lang === 'gl' || lang === 'eu' || lang === 'ca' ||
-      (lang && lang.match(/es_.*/)) ||
-      (lang && lang.match(/es-.*/))) {
-    return 'es';
-  }
-  return 'en';
-};
-
 export const getFileNameOfLang = (dir, fileName, ext, lang) => {
   const base = `${dir}/${fileName}`;
   const fallback = getFallbackLang(lang);
diff --git a/imports/startup/server/accounts/lang-fallback.js b/imports/startup/server/accounts/lang-fallback.js
index af96ce5..67fbb66 100644
--- a/imports/startup/server/accounts/lang-fallback.js
+++ b/imports/startup/server/accounts/lang-fallback.js
@@ -1,5 +1,5 @@
 const getFallbackLang = (lang) => {
-  if (lang && (lang === 'ast' || lang === 'gl' || lang === 'eu' || lang === 'ca' || lang.match(/^es/))) {
+  if (lang && (lang === 'ast' || lang === 'gl' || lang === 'eu' || lang === 'ca' || lang.match(/^es-/))) {
     return 'es';
   }
   return 'en';
diff --git a/test/file.test.js b/test/file.test.js
index 90f3cd7..d4454fb 100644
--- a/test/file.test.js
+++ b/test/file.test.js
@@ -33,8 +33,4 @@ describe('get file of page', () => {
   it('lang es-PE retrieve es', async () => {
     chai.expect('pages/about-es.md').to.deep.equal(getFileNameOfLang('pages', 'about', 'md', 'es-PE'));
   });
-
-  it('lang es_PE retrieve es', async () => {
-    chai.expect('pages/about-es.md').to.deep.equal(getFileNameOfLang('pages', 'about', 'md', 'es_PE'));
-  });
 });