diff --git a/package.json b/package.json
index 29e775d09..9fb3da250 100644
--- a/package.json
+++ b/package.json
@@ -75,6 +75,7 @@
     "dicom-parser": "^1.8.3",
     "dicomweb-client": "^0.4.2",
     "hammerjs": "^2.0.8",
+    "i18next": "^15.1.3",
     "lodash.isequal": "4.5.0",
     "moment": "^2.24.0",
     "ohif-core": "0.5.5",
@@ -88,6 +89,7 @@
     "react-bootstrap-modal": "^4.2.0",
     "react-dnd": "^7.0.2",
     "react-dnd-html5-backend": "^7.0.2",
+    "react-i18next": "^10.11.0",
     "react-redux": "^6.0.0",
     "react-resize-detector": "^3.4.0",
     "react-router": "^4.3.1",
diff --git a/src/App.js b/src/App.js
index 7d3718fd3..8141279fc 100644
--- a/src/App.js
+++ b/src/App.js
@@ -3,6 +3,7 @@ import { BrowserRouter as Router } from 'react-router-dom';
 import { Provider } from 'react-redux';
 import { createStore, combineReducers } from 'redux';
 import PropTypes from 'prop-types';
+import { I18nextProvider } from 'react-i18next';
 import OHIF from 'ohif-core';
 import './config';
 import ui from './redux/ui.js';
@@ -21,6 +22,7 @@ import {
 } from './utils/index.js';
 import setupTools from './setupTools';
 import ConnectedToolContextMenu from './connectedComponents/ConnectedToolContextMenu';
+import i18n from './i18n';
 
 const { ExtensionManager } = OHIF.extensions;
 const { reducers, localStorage } = OHIF.redux;
@@ -107,15 +109,19 @@ class App extends Component {
 
     if (userManager) {
       return (
-        <Provider store={store}>
-          <OidcProvider store={store} userManager={userManager}>
-            <Router basename={this.props.routerBasename}>
-              <WhiteLabellingContext.Provider value={this.props.whiteLabelling}>
-                <OHIFStandaloneViewer userManager={userManager} />
-              </WhiteLabellingContext.Provider>
-            </Router>
-          </OidcProvider>
-        </Provider>
+        <I18nextProvider i18n={i18n}>
+          <Provider store={store}>
+            <OidcProvider store={store} userManager={userManager}>
+              <Router basename={this.props.routerBasename}>
+                <WhiteLabellingContext.Provider
+                  value={this.props.whiteLabelling}
+                >
+                  <OHIFStandaloneViewer userManager={userManager} />
+                </WhiteLabellingContext.Provider>
+              </Router>
+            </OidcProvider>
+          </Provider>
+        </I18nextProvider>
       );
     }
 
diff --git a/src/components/Header/Header.js b/src/components/Header/Header.js
index 010baa830..0dd96b529 100644
--- a/src/components/Header/Header.js
+++ b/src/components/Header/Header.js
@@ -2,6 +2,7 @@ import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import { Link, withRouter } from 'react-router-dom';
 import { Dropdown } from 'react-viewerbase';
+import { withTranslation } from 'react-i18next';
 import './Header.css';
 import OHIFLogo from '../OHIFLogo/OHIFLogo.js';
 import ConnectedUserPreferencesModal from '../../connectedComponents/ConnectedUserPreferencesModal.js';
@@ -69,7 +70,9 @@ class Header extends Component {
         </div>
 
         <div className="header-menu">
-          <span className="research-use">INVESTIGATIONAL USE ONLY</span>
+          <span className="research-use">
+            INVESTIGATIONAL USE ONLY {this.props.t('header_test')}
+          </span>
           <Dropdown title="Options" list={this.options} align="right" />
           <ConnectedUserPreferencesModal />
         </div>
@@ -78,4 +81,4 @@ class Header extends Component {
   }
 }
 
-export default withRouter(Header);
+export default withTranslation('Header')(withRouter(Header));
diff --git a/src/i18n.js b/src/i18n.js
new file mode 100755
index 000000000..b2fa0104e
--- /dev/null
+++ b/src/i18n.js
@@ -0,0 +1,73 @@
+import i18n from 'i18next';
+import { initReactI18next } from 'react-i18next';
+
+const currentLanguage = process.env.APP_LANG || 'en-US';
+
+function getDefaultLanguage() {
+  const mainLanguage = currentLanguage.match(/(.*.)(-)/);
+  return mainLanguage !== null ? mainLanguage[1] : null;
+}
+
+function getCleanKeyForNameSpaces(key) {
+  const regexKeyCleaner = new RegExp(
+    `^(\\.\\/${currentLanguage}\\/)(.*.)(\\.json)$`
+  );
+  const cleanedKey = key.match(regexKeyCleaner);
+  return cleanedKey !== null ? cleanedKey[2] : null;
+}
+
+function getCleanKeyForDefaults(key) {
+  const regexKeyCleaner = new RegExp(
+    `^(\\.\\/${getDefaultLanguage()}\\/)(.*.)(\\.json)$`
+  );
+  const cleanedKey = key.match(regexKeyCleaner);
+  return cleanedKey !== null ? cleanedKey[2] : null;
+}
+
+function getLocales() {
+  const currentLangList = {};
+  const defaultLangList = {};
+  const locales = {};
+  const context = require.context(`./locales`, true, /\.json$/);
+
+  context.keys().forEach(key => {
+    const isTheSameOfCurrentLang = key.indexOf(currentLanguage) >= 0;
+    const isADefaultLang = key.indexOf(`${getDefaultLanguage()}/`) >= 0;
+
+    if (isTheSameOfCurrentLang) {
+      currentLangList[getCleanKeyForNameSpaces(key)] = context(key);
+    }
+
+    if (isADefaultLang) {
+      defaultLangList[getCleanKeyForDefaults(key)] = context(key);
+    }
+  });
+
+  locales[currentLanguage] = { ...currentLangList };
+  locales[getDefaultLanguage()] = { ...defaultLangList };
+  return locales;
+}
+
+console.log(getLocales(), ' > ', getDefaultLanguage());
+
+// console.log(getLocales(), currentLanguage, getDefaultLanguage());
+
+i18n.use(initReactI18next).init({
+  // resources: getLocales(),
+  resources: getLocales(),
+  fallbackLng: getDefaultLanguage(),
+  lng: currentLanguage,
+  debug: true,
+
+  // have a common namespace used around the full app
+  keySeparator: false, // uses content as keys
+  interpolation: {
+    escapeValue: false,
+  },
+
+  react: {
+    wait: true,
+  },
+});
+
+export default i18n;
diff --git a/src/locales/en-UK/Header.json b/src/locales/en-UK/Header.json
new file mode 100644
index 000000000..d4909843d
--- /dev/null
+++ b/src/locales/en-UK/Header.json
@@ -0,0 +1,3 @@
+{
+  "header_test": "Joao Grandao"
+}
diff --git a/src/locales/en-UK/common.json b/src/locales/en-UK/common.json
new file mode 100755
index 000000000..f47a451d8
--- /dev/null
+++ b/src/locales/en-UK/common.json
@@ -0,0 +1,6 @@
+{
+  "common": {
+    "Welcome to React": "Welcome to React and react-i18next",
+    "welcomeMsg": "welcome"
+  }
+}
diff --git a/src/locales/en-US/Header.json b/src/locales/en-US/Header.json
new file mode 100644
index 000000000..383d28867
--- /dev/null
+++ b/src/locales/en-US/Header.json
@@ -0,0 +1,3 @@
+{
+  "header_test": "$t(common:test)"
+}
diff --git a/src/locales/en-US/common.json b/src/locales/en-US/common.json
new file mode 100755
index 000000000..1d6ab1537
--- /dev/null
+++ b/src/locales/en-US/common.json
@@ -0,0 +1,3 @@
+{
+  "tests___": "test common"
+}
diff --git a/src/locales/en/Header.json b/src/locales/en/Header.json
new file mode 100644
index 000000000..383d28867
--- /dev/null
+++ b/src/locales/en/Header.json
@@ -0,0 +1,3 @@
+{
+  "header_test": "$t(common:test)"
+}
diff --git a/src/locales/en/common.json b/src/locales/en/common.json
new file mode 100755
index 000000000..6b89c3168
--- /dev/null
+++ b/src/locales/en/common.json
@@ -0,0 +1,5 @@
+{
+  "Welcome to React": "Welcome to React and react-i18next",
+  "welcomeMsg": "welcome",
+  "test": "Coffee time"
+}
diff --git a/yarn.lock b/yarn.lock
index 7b88a30c5..b5373f36e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6159,6 +6159,13 @@ html-minifier@^3.2.3:
     relateurl "0.2.x"
     uglify-js "3.4.x"
 
+html-parse-stringify2@2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/html-parse-stringify2/-/html-parse-stringify2-2.0.1.tgz#dc5670b7292ca158b7bc916c9a6735ac8872834a"
+  integrity sha1-3FZwtyksoVi3vJFsmmc1rIhyg0o=
+  dependencies:
+    void-elements "^2.0.1"
+
 html-tags@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/html-tags/-/html-tags-2.0.0.tgz#10b30a386085f43cede353cc8fa7cb0deeea668b"
@@ -6294,6 +6301,13 @@ husky@1.3.x:
     run-node "^1.0.0"
     slash "^2.0.0"
 
+i18next@^15.1.3:
+  version "15.1.3"
+  resolved "https://registry.yarnpkg.com/i18next/-/i18next-15.1.3.tgz#f1984cbee0e3cb00cff9008b037264289ce8840a"
+  integrity sha512-hN2DZLoRSY2h/RYeNqth5XxV4N1ekKGSJDCGhFmmuXkOCAfK5CkUG4VBv9OBXrvf93xApv0KKBVrb0zJP31EKg==
+  dependencies:
+    "@babel/runtime" "^7.3.1"
+
 iconv-lite@0.4.23:
   version "0.4.23"
   resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.23.tgz#297871f63be507adcfbfca715d0cd0eed84e9a63"
@@ -11592,6 +11606,14 @@ react-error-overlay@^5.1.4:
   resolved "https://registry.yarnpkg.com/react-error-overlay/-/react-error-overlay-5.1.4.tgz#88dfb88857c18ceb3b9f95076f850d7121776991"
   integrity sha512-fp+U98OMZcnduQ+NSEiQa4s/XMsbp+5KlydmkbESOw4P69iWZ68ZMFM5a2BuE0FgqPBKApJyRuYHR95jM8lAmg==
 
+react-i18next@^10.11.0:
+  version "10.11.0"
+  resolved "https://registry.yarnpkg.com/react-i18next/-/react-i18next-10.11.0.tgz#a6854e556d3aff9f5f161b4aa871d43cfff6bd9b"
+  integrity sha512-jmxLZK8mf+KxG3RUIiu/COperTq1c7+iHNsna7LODOYEYaoj6EXFuchOytnB80GoUOb0JC1csT37Zp+U5nPQqQ==
+  dependencies:
+    "@babel/runtime" "^7.3.1"
+    html-parse-stringify2 "2.0.1"
+
 react-is@^16.3.2, react-is@^16.7.0, react-is@^16.8.1, react-is@^16.8.2, react-is@^16.8.4, react-is@^16.8.6:
   version "16.8.6"
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.8.6.tgz#5bbc1e2d29141c9fbdfed456343fe2bc430a6a16"
@@ -14541,6 +14563,11 @@ vm-browserify@0.0.4:
   dependencies:
     indexof "0.0.1"
 
+void-elements@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/void-elements/-/void-elements-2.0.1.tgz#c066afb582bb1cb4128d60ea92392e94d5e9dbec"
+  integrity sha1-wGavtYK7HLQSjWDqkjkulNXp2+w=
+
 vtk.js@^8.3.11:
   version "8.4.9"
   resolved "https://registry.yarnpkg.com/vtk.js/-/vtk.js-8.4.9.tgz#139d3cf2f36139e836fc1cf360b47e0d05f0b3be"