diff --git a/src/CallHandler.js b/src/CallHandler.js
index ca913528ed..b2ccf65df7 100644
--- a/src/CallHandler.js
+++ b/src/CallHandler.js
@@ -226,7 +226,7 @@ function _onAction(payload) {
                 const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
                 Modal.createDialog(ErrorDialog, {
                     title: _t('Existing Call'),
-                    description: _t('You are already in a call') + '.',
+                    description: _t('You are already in a call.'),
                 });
                 return; // don't allow >1 call to be placed.
             }
@@ -236,7 +236,7 @@ function _onAction(payload) {
                 const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
                 Modal.createDialog(ErrorDialog, {
                     title: _t('VoIP is unsupported'),
-                    description: _t('You cannot place VoIP calls in this browser') + '.',
+                    description: _t('You cannot place VoIP calls in this browser.'),
                 });
                 return;
             }
@@ -251,7 +251,7 @@ function _onAction(payload) {
             if (members.length <= 1) {
                 const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
                 Modal.createDialog(ErrorDialog, {
-                    description: _t('You cannot place a call with yourself') + '.',
+                    description: _t('You cannot place a call with yourself.'),
                 });
                 return;
             }
@@ -284,7 +284,7 @@ function _onAction(payload) {
                 const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
                 Modal.createDialog(ErrorDialog, {
                     title: _t('VoIP is unsupported'),
-                    description: _t('You cannot place VoIP calls in this browser') + '.',
+                    description: _t('You cannot place VoIP calls in this browser.'),
                 });
             }
             else if (MatrixClientPeg.get().isRoomEncrypted(payload.room_id)) {
@@ -303,7 +303,7 @@ function _onAction(payload) {
                 var QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
                 Modal.createDialog(QuestionDialog, {
                     title: _t('Warning!'),
-                    description: _t('Conference calling is in development and may not be reliable') + '.',
+                    description: _t('Conference calling is in development and may not be reliable.'),
                     onFinished: confirm=>{
                         if (confirm) {
                             ConferenceHandler.createNewMatrixCall(
@@ -315,7 +315,7 @@ function _onAction(payload) {
                                 console.error("Conference call failed: " + err);
                                 Modal.createDialog(ErrorDialog, {
                                     title: _t('Failed to set up conference call'),
-                                    description: _t('Conference call failed') + '. ' + ((err && err.message) ? err.message : ''),
+                                    description: _t('Conference call failed.') + ' ' + ((err && err.message) ? err.message : ''),
                                 });
                             });
                         }
diff --git a/src/Login.js b/src/Login.js
index 107a8825e9..93985605f9 100644
--- a/src/Login.js
+++ b/src/Login.js
@@ -16,6 +16,7 @@ limitations under the License.
 */
 
 import Matrix from "matrix-js-sdk";
+import { _t } from "./languageHandler";
 
 import q from 'q';
 import url from 'url';
@@ -97,9 +98,9 @@ export default class Login {
             };
         }, (error) => {
             if (error.httpStatus === 403) {
-                error.friendlyText = "Guest access is disabled on this Home Server.";
+                error.friendlyText = _t("Guest access is disabled on this Home Server.");
             } else {
-                error.friendlyText = "Failed to register as guest: " + error.data;
+                error.friendlyText = _t("Failed to register as guest:") + ' ' + error.data;
             }
             throw error;
         });
@@ -158,12 +159,12 @@ export default class Login {
         }, function(error) {
             if (error.httpStatus == 400 && loginParams.medium) {
                 error.friendlyText = (
-                    'This Home Server does not support login using email address.'
+                    _t('This Home Server does not support login using email address.');
                 );
             }
             else if (error.httpStatus === 403) {
                 error.friendlyText = (
-                    'Incorrect username and/or password.'
+                    _t('Incorrect username and/or password.')
                 );
                 if (self._fallbackHsUrl) {
                     var fbClient = Matrix.createClient({
@@ -187,7 +188,7 @@ export default class Login {
             }
             else {
                 error.friendlyText = (
-                    'There was a problem logging in. (HTTP ' + error.httpStatus + ")"
+                    _t("There was a problem logging in.") + ' (HTTP ' + error.httpStatus + ")"
                 );
             }
             throw error;
diff --git a/src/PasswordReset.js b/src/PasswordReset.js
index 668b8f67da..0739ca0a24 100644
--- a/src/PasswordReset.js
+++ b/src/PasswordReset.js
@@ -82,7 +82,7 @@ class PasswordReset {
                 err.message = _t('Failed to verify email address: make sure you clicked the link in the email');
             }
             else if (err.httpStatus === 404) {
-                err.message = _t('Your email address does not appear to be associated with a Matrix ID on this Homeserver') + '.';
+                err.message = _t('Your email address does not appear to be associated with a Matrix ID on this Homeserver.');
             }
             else if (err.httpStatus) {
                 err.message += ` (Status ${err.httpStatus})`;
diff --git a/src/autocomplete/AutocompleteProvider.js b/src/autocomplete/AutocompleteProvider.js
index 5c90990295..7988ab8a02 100644
--- a/src/autocomplete/AutocompleteProvider.js
+++ b/src/autocomplete/AutocompleteProvider.js
@@ -1,3 +1,19 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import React from 'react';
 import type {Completion, SelectionRange} from './Autocompleter';
 
diff --git a/src/autocomplete/Autocompleter.js b/src/autocomplete/Autocompleter.js
index 1bf1b1dc14..8678321ab2 100644
--- a/src/autocomplete/Autocompleter.js
+++ b/src/autocomplete/Autocompleter.js
@@ -1,3 +1,19 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 // @flow
 
 import type {Component} from 'react';
diff --git a/src/autocomplete/CommandProvider.js b/src/autocomplete/CommandProvider.js
index fef0544b8a..fe9a7bae12 100644
--- a/src/autocomplete/CommandProvider.js
+++ b/src/autocomplete/CommandProvider.js
@@ -1,3 +1,19 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import React from 'react';
 import { _t } from '../languageHandler';
 import AutocompleteProvider from './AutocompleteProvider';
diff --git a/src/autocomplete/Components.js b/src/autocomplete/Components.js
index 4595f7456d..e553fef079 100644
--- a/src/autocomplete/Components.js
+++ b/src/autocomplete/Components.js
@@ -1,3 +1,19 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import React from 'react';
 import ReactDOM from 'react-dom';
 import classNames from 'classnames';
diff --git a/src/autocomplete/DuckDuckGoProvider.js b/src/autocomplete/DuckDuckGoProvider.js
index bffd924976..5dae1b46d4 100644
--- a/src/autocomplete/DuckDuckGoProvider.js
+++ b/src/autocomplete/DuckDuckGoProvider.js
@@ -1,4 +1,21 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import React from 'react';
+import { _t } from '../languageHandler';
 import AutocompleteProvider from './AutocompleteProvider';
 import 'whatwg-fetch';
 
@@ -75,7 +92,7 @@ export default class DuckDuckGoProvider extends AutocompleteProvider {
     }
 
     getName() {
-        return '🔍 Results from DuckDuckGo';
+        return '🔍 ' + _t('Results from DuckDuckGo');
     }
 
     static getInstance(): DuckDuckGoProvider {
diff --git a/src/autocomplete/EmojiProvider.js b/src/autocomplete/EmojiProvider.js
index 7b9e8fb669..ca434072cb 100644
--- a/src/autocomplete/EmojiProvider.js
+++ b/src/autocomplete/EmojiProvider.js
@@ -1,3 +1,19 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import React from 'react';
 import { _t } from '../languageHandler';
 import AutocompleteProvider from './AutocompleteProvider';
diff --git a/src/autocomplete/RoomProvider.js b/src/autocomplete/RoomProvider.js
index 4a2dd09eb5..b6c8c2f263 100644
--- a/src/autocomplete/RoomProvider.js
+++ b/src/autocomplete/RoomProvider.js
@@ -1,3 +1,19 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import React from 'react';
 import { _t } from '../languageHandler';
 import AutocompleteProvider from './AutocompleteProvider';
diff --git a/src/autocomplete/UserProvider.js b/src/autocomplete/UserProvider.js
index 281b6fd40d..4dc867ba55 100644
--- a/src/autocomplete/UserProvider.js
+++ b/src/autocomplete/UserProvider.js
@@ -1,3 +1,19 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import React from 'react';
 import { _t } from '../languageHandler';
 import AutocompleteProvider from './AutocompleteProvider';
diff --git a/src/createRoom.js b/src/createRoom.js
index 0a21f68208..cd8cd7bac3 100644
--- a/src/createRoom.js
+++ b/src/createRoom.js
@@ -45,7 +45,7 @@ function createRoom(opts) {
         setTimeout(()=>{
             Modal.createDialog(NeedToRegisterDialog, {
                 title: _t('Please Register'),
-                description: _t('Guest users can\'t create new rooms. Please register to create room and start a chat') + '.'
+                description: _t('Guest users can\'t create new rooms. Please register to create room and start a chat.')
             });
         }, 0);
         return q(null);
@@ -106,7 +106,7 @@ function createRoom(opts) {
         console.error("Failed to create room " + roomId + " " + err);
         Modal.createDialog(ErrorDialog, {
             title: _t("Failure to create room"),
-            description: _t("Server may be unavailable, overloaded, or you hit a bug") + ".",
+            description: _t("Server may be unavailable, overloaded, or you hit a bug."),
         });
         return null;
     });
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 6112d4356e..85e6343359 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -192,8 +192,8 @@
   "Click to unmute audio": "Click to unmute audio",
   "Command error": "Command error",
   "Commands": "Commands",
-  "Conference call failed": "Conference call failed",
-  "Conference calling is in development and may not be reliable": "Conference calling is in development and may not be reliable",
+  "Conference call failed.": "Conference call failed.",
+  "Conference calling is in development and may not be reliable.": "Conference calling is in development and may not be reliable.",
   "Conference calls are not supported in encrypted rooms": "Conference calls are not supported in encrypted rooms",
   "Conference calls are not supported in this client": "Conference calls are not supported in this client",
   "Confirm password": "Confirm password",
@@ -260,6 +260,7 @@
   "Failed to load timeline position": "Failed to load timeline position",
   "Failed to lookup current room": "Failed to lookup current room",
   "Failed to mute user": "Failed to mute user",
+  "Failed to register as guest:": "Failed to register as guest:",
   "Failed to reject invite": "Failed to reject invite",
   "Failed to reject invitation": "Failed to reject invitation",
   "Failed to save settings": "Failed to save settings",
@@ -284,8 +285,9 @@
   "For security, logging out will delete any end-to-end encryption keys from this browser. If you want to be able to decrypt your conversation history from future Riot sessions, please export your room keys for safe-keeping.": "For security, logging out will delete any end-to-end encryption keys from this browser. If you want to be able to decrypt your conversation history from future Riot sessions, please export your room keys for safe-keeping.",
   "Found a bug?": "Found a bug?",
   "%(userId)s from %(fromPowerLevel)s to %(toPowerLevel)s": "%(userId)s from %(fromPowerLevel)s to %(toPowerLevel)s",
+  "Guest access is disabled on this Home Server.": "Guest access is disabled on this Home Server.",
   "Guests can't set avatars. Please register.": "Guests can't set avatars. Please register.",
-  "Guest users can't create new rooms. Please register to create room and start a chat": "Guest users can't create new rooms. Please register to create room and start a chat",
+  "Guest users can't create new rooms. Please register to create room and start a chat.": "Guest users can't create new rooms. Please register to create room and start a chat.",
   "Guest users can't upload files. Please register to upload": "Guest users can't upload files. Please register to upload",
   "Guests can't use labs features. Please register.": "Guests can't use labs features. Please register.",
   "Guests cannot join this room even if explicitly invited.": "Guests cannot join this room even if explicitly invited.",
@@ -299,6 +301,7 @@
   "I have verified my email address": "I have verified my email address",
   "Import": "Import",
   "Import E2E room keys": "Import E2E room keys",
+  "Incorrect username and/or password.": "Incorrect username and/or password.",
   "Incorrect verification code": "Incorrect verification code",
   "Interface Language": "Interface Language",
   "Invalid alias format": "Invalid alias format",
@@ -404,6 +407,7 @@
   "Report it": "Report it",
   "Resetting password will currently reset any end-to-end encryption keys on all devices, making encrypted chat history unreadable, unless you first export your room keys and re-import them afterwards. In future this will be improved.": "Resetting password will currently reset any end-to-end encryption keys on all devices, making encrypted chat history unreadable, unless you first export your room keys and re-import them afterwards. In future this will be improved.",
   "restore": "restore",
+  "Results from DuckDuckGo": "Results from DuckDuckGo",
   "Return to app": "Return to app",
   "Return to login screen": "Return to login screen",
   "Riot does not have permission to send you notifications - please check your browser settings": "Riot does not have permission to send you notifications - please check your browser settings",
@@ -431,7 +435,7 @@
   "Server may be unavailable or overloaded": "Server may be unavailable or overloaded",
   "Server may be unavailable, overloaded, or search timed out :(": "Server may be unavailable, overloaded, or search timed out :(",
   "Server may be unavailable, overloaded, or the file too big": "Server may be unavailable, overloaded, or the file too big",
-  "Server may be unavailable, overloaded, or you hit a bug": "Server may be unavailable, overloaded, or you hit a bug",
+  "Server may be unavailable, overloaded, or you hit a bug.": "Server may be unavailable, overloaded, or you hit a bug.",
   "Server unavailable, overloaded, or something else went wrong": "Server unavailable, overloaded, or something else went wrong",
   "Session ID": "Session ID",
   "%(senderName)s set a profile picture.": "%(senderName)s set a profile picture.",
@@ -464,6 +468,8 @@
   "The file '%(fileName)s' exceeds this home server's size limit for uploads": "The file '%(fileName)s' exceeds this home server's size limit for uploads",
   "The file '%(fileName)s' failed to upload": "The file '%(fileName)s' failed to upload",
   "The remote side failed to pick up": "The remote side failed to pick up",
+  "This Home Server does not support login using email address.": "This Home Server does not support login using email address.",
+  "There was a problem logging in.": "There was a problem logging in.",
   "This room has no local addresses": "This room has no local addresses",
   "This room is not recognised.": "This room is not recognised.",
   "This room is private or inaccessible to guests. You may be able to join if you register": "This room is private or inaccessible to guests. You may be able to join if you register",
@@ -545,11 +551,11 @@
   "Who would you like to communicate with?": "Who would you like to communicate with?",
   "%(senderName)s withdrew %(targetName)s's invitation.": "%(senderName)s withdrew %(targetName)s's invitation.",
   "Would you like to": "Would you like to",
-  "You are already in a call": "You are already in a call",
+  "You are already in a call.": "You are already in a call.",
   "You're not in any rooms yet! Press": "You're not in any rooms yet! Press",
   "You are trying to access %(roomName)s": "You are trying to access %(roomName)s",
-  "You cannot place a call with yourself": "You cannot place a call with yourself",
-  "You cannot place VoIP calls in this browser": "You cannot place VoIP calls in this browser",
+  "You cannot place a call with yourself.": "You cannot place a call with yourself.",
+  "You cannot place VoIP calls in this browser.": "You cannot place VoIP calls in this browser.",
   "You do not have permission to post to this room": "You do not have permission to post to this room",
   "You have been invited to join this room by %(inviterName)s": "You have been invited to join this room by %(inviterName)s",
   "You have been logged out of all devices and will no longer receive push notifications. To re-enable notifications, sign in again on each device": "You have been logged out of all devices and will no longer receive push notifications. To re-enable notifications, sign in again on each device",
@@ -559,7 +565,7 @@
   "You need to be logged in.": "You need to be logged in.",
   "You need to enter a user name.": "You need to enter a user name.",
   "You need to log back in to generate end-to-end encryption keys for this device and submit the public key to your homeserver. This is a once off; sorry for the inconvenience.": "You need to log back in to generate end-to-end encryption keys for this device and submit the public key to your homeserver. This is a once off; sorry for the inconvenience.",
-  "Your email address does not appear to be associated with a Matrix ID on this Homeserver": "Your email address does not appear to be associated with a Matrix ID on this Homeserver",
+  "Your email address does not appear to be associated with a Matrix ID on this Homeserver.": "Your email address does not appear to be associated with a Matrix ID on this Homeserver.",
   "Your password has been reset": "Your password has been reset",
   "Your password was successfully changed. You will not receive push notifications on other devices until you log back in to them": "Your password was successfully changed. You will not receive push notifications on other devices until you log back in to them",
   "You seem to be in a call, are you sure you want to quit?": "You seem to be in a call, are you sure you want to quit?",
@@ -700,7 +706,6 @@
   "This process allows you to import encryption keys that you had previously exported from another Matrix client. You will then be able to decrypt any messages that the other client could decrypt.": "This process allows you to import encryption keys that you had previously exported from another Matrix client. You will then be able to decrypt any messages that the other client could decrypt.",
   "The export file will be protected with a passphrase. You should enter the passphrase here, to decrypt the file.": "The export file will be protected with a passphrase. You should enter the passphrase here, to decrypt the file.",
   "You must join the room to see its files": "You must join the room to see its files",
-  "Server may be unavailable, overloaded, or you hit a bug.": "Server may be unavailable, overloaded, or you hit a bug.",
   "Reject all %(invitedRooms)s invites": "Reject all %(invitedRooms)s invites",
   "Start new Chat": "Start new Chat",
   "Guest users can't invite users. Please register.": "Guest users can't invite users. Please register.",