diff --git a/loopback/server/middleware/error-handler.js b/loopback/server/middleware/error-handler.js
index 94c30597bd..e274396a65 100644
--- a/loopback/server/middleware/error-handler.js
+++ b/loopback/server/middleware/error-handler.js
@@ -2,10 +2,12 @@
 const UserError = require('../../util/user-error');
 const logToConsole = require('strong-error-handler/lib/logger');
 const valueIsNot = require('./value-is-not');
+const valueInvalid = require('./value-invalid');
 
-const validations = [{
-    ...valueIsNot
-}];
+const validations = [
+    valueIsNot,
+    valueInvalid
+];
 module.exports = function() {
     return function(err, req, res, next) {
         // Thrown user errors
@@ -15,11 +17,11 @@ module.exports = function() {
         }
 
         // Validation errors
-        if (err.statusCode == 400) {
+        if ([400, 422].includes(err.statusCode)) {
             try {
                 validations.forEach(validation => {
                     if (validation.validation(err.message)) {
-                        const error = validation.handleError(req);
+                        const error = validation.handleError(req, err);
                         if (error)
                             err.message = validation.message(error, req);
                     }
@@ -28,8 +30,6 @@ module.exports = function() {
                 return next(err);
             } catch (e) {
             }
-        }
-        if (err.statusCode == 422) {
             try {
                 let code;
                 let {messages} = err.details;
diff --git a/loopback/server/middleware/value-invalid.js b/loopback/server/middleware/value-invalid.js
new file mode 100644
index 0000000000..962aa9e1f4
--- /dev/null
+++ b/loopback/server/middleware/value-invalid.js
@@ -0,0 +1,58 @@
+const SLASH = '/';
+const $t = require('i18n');
+const {models} = require('vn-loopback/server/server');
+const mapLocale = require('../../util/map-locales');
+
+
+module.exports = {
+    validation: message => String(message).includes('is not valid'),
+    message: ({tagValue}, {__: $t}) =>
+        $t('Field are invalid', {tag: tagValue}),
+    handleError: ({method: verb, originalUrl, body}, err) => {
+        let tag = null;
+        let module = null;
+        let moduleOriginal = null;
+        let path = null;
+        try {
+            if (originalUrl.includes('?'))
+                originalUrl = originalUrl.split('?')[0];
+
+            originalUrl = originalUrl.split('api/')[1];
+            [module, ...path] = originalUrl.split(SLASH);
+
+            moduleOriginal = module;
+            let model = models[module];
+            // Capitalize
+            if (!model) {
+                module = module.charAt(0).toUpperCase() + module.slice(1);
+                model = models[module];
+            }
+            // Singular
+            if (!model) {
+                module = module.substring(0, module.length - 1);
+                model = models[module];
+            }
+            if (!model) throw new Error('No matching model found');
+            tag = Object.keys(err.details.codes)[0];
+            if (tag) {
+                let tagValue = mapLocale[$t.getLocale()][tag];
+                if (!tagValue) tagValue = tag;
+                return {tag, tagValue};
+            }
+        } catch (error) {
+            throw new Error(error);
+        }
+    }
+
+};
+
+
+
+function isJsonString(str) {
+    try {
+        let json = JSON.parse(str);
+        return (typeof json === 'object');
+    } catch (e) {
+        return false;
+    }
+}
diff --git a/loopback/server/middleware/value-is-not.js b/loopback/server/middleware/value-is-not.js
index 09c4ac7a8c..021af3fb9f 100644
--- a/loopback/server/middleware/value-is-not.js
+++ b/loopback/server/middleware/value-is-not.js
@@ -1,28 +1,15 @@
 const SLASH = '/';
-const MODULES = 'modules';
-const BACK = 'back';
-const path = require('path');
-const glob = require('glob');
-const modulesPath = `${MODULES}/**/${BACK}/locale/**/**.yml`;
-const pathResolve = path.resolve(modulesPath);
-const modelsLocale = glob.sync(pathResolve, {}).map(f => {
-    const file = require(f);
-    const model = f.substring(f.indexOf(MODULES), f.indexOf(BACK) - 1).split(SLASH)[1];
-    const locale = path.parse(f).base.split('.')[0];
-    return [keyMap(model, locale), file.columns];
-}
-);
 const {models} = require('vn-loopback/server/server');
-const mapLocale = new Map(modelsLocale);
+const $t = require('i18n');
+const mapLocale = require('../../util/map-locales');
 
 module.exports = {
     validation: message => String(message).startsWith('Value is not'),
     message: ({tagValue}, {__: $t}) =>
         $t('Field are invalid', {tag: tagValue}),
-    handleError: ({method: verb, originalUrl, body, __: $t}) => {
+    handleError: ({method: verb, originalUrl, body}) => {
         let tag = null;
         let module = null;
-        let moduleOriginal = null;
         let path = null;
         let hasId = false;
         try {
@@ -33,7 +20,6 @@ module.exports = {
             [module, ...path] = originalUrl.split(SLASH);
             hasId = path.length > 1;
 
-            moduleOriginal = module;
             let model = models[module];
             // Capitalize
             if (!model) {
@@ -98,7 +84,7 @@ module.exports = {
                 }
             }
             if (tag) {
-                let tagValue = mapLocale.get(keyMap(moduleOriginal, $t.getLocale()))[tag];
+                let tagValue = mapLocale[$t.getLocale()][tag];
                 if (!tagValue) tagValue = tag;
                 return {tag, tagValue};
             }
@@ -109,9 +95,6 @@ module.exports = {
 
 };
 
-function keyMap(model, local, connector = '_') {
-    return `${model}${connector}${local}`;
-}
 
 function isJsonString(str) {
     try {
diff --git a/loopback/util/map-locales.js b/loopback/util/map-locales.js
new file mode 100644
index 0000000000..692de3f231
--- /dev/null
+++ b/loopback/util/map-locales.js
@@ -0,0 +1,23 @@
+const SLASH = '/';
+const MODULES = 'modules';
+const BACK = 'back';
+const path = require('path');
+const glob = require('glob');
+const modulesPath = `${MODULES}/**/${BACK}/locale/**/**.yml`;
+const pathResolve = path.resolve(modulesPath);
+
+const modelsLocale = glob.sync(pathResolve, {}).reduce((acc, f) => {
+    const file = require(f);
+    const model = f.substring(f.indexOf(MODULES), f.indexOf(BACK) - 1).split(SLASH)[1];
+    const locale = path.parse(f).base.split('.')[0];
+
+    if (!acc[locale]) acc[locale] = {};
+    acc[locale] = Object.assign(acc[locale], file.columns);
+    return acc;
+}, {}
+);
+function keyMap(model, local, connector = '_') {
+    return `${model}${connector}${local}`;
+}
+module.exports =modelsLocale;
+