diff --git a/assets/javascripts/wizard/components/custom-user-selector.js.es6 b/assets/javascripts/wizard/components/custom-user-selector.js.es6
index dfc45604..6ca5698d 100644
--- a/assets/javascripts/wizard/components/custom-user-selector.js.es6
+++ b/assets/javascripts/wizard/components/custom-user-selector.js.es6
@@ -1,7 +1,7 @@
 import { default as computed, observes } from 'discourse-common/utils/decorators';
 import { renderAvatar } from 'discourse/helpers/user-avatar';
 import userSearch from '../lib/user-search';
-import I18n from "I18n";
+import WizardI18n from "../lib/wizard-i18n";
 
 const template = function(params) {
   const options = params.options;
@@ -35,7 +35,7 @@ export default Ember.TextField.extend({
 
   @computed("placeholderKey")
   placeholder(placeholderKey) {
-    return placeholderKey ? I18n.t(placeholderKey) : "";
+    return placeholderKey ? WizardI18n(placeholderKey) : "";
   },
 
   @observes('usernames')
diff --git a/assets/javascripts/wizard/components/wizard-composer-editor.js.es6 b/assets/javascripts/wizard/components/wizard-composer-editor.js.es6
index 2da0e4a6..3689588a 100644
--- a/assets/javascripts/wizard/components/wizard-composer-editor.js.es6
+++ b/assets/javascripts/wizard/components/wizard-composer-editor.js.es6
@@ -20,6 +20,7 @@ import {
 import { cacheShortUploadUrl } from "pretty-text/upload-short-url";
 import { alias } from "@ember/object/computed";
 import { uploadIcon } from "discourse/lib/uploads";
+import WizardI18n from '../lib/wizard-i18n';
 
 const uploadMarkdownResolvers = [];
 
@@ -103,7 +104,7 @@ export default ComposerEditor.extend({
       // Limit the number of simultaneous uploads
       if (max > 0 && data.files.length > max) {
         bootbox.alert(
-          I18n.t("post.errors.too_many_dragged_and_dropped_files", { max })
+          WizardI18n("post.errors.too_many_dragged_and_dropped_files", { max })
         );
         return false;
       }
diff --git a/assets/javascripts/wizard/components/wizard-field-upload.js.es6 b/assets/javascripts/wizard/components/wizard-field-upload.js.es6
index 2241c940..5eefce9a 100644
--- a/assets/javascripts/wizard/components/wizard-field-upload.js.es6
+++ b/assets/javascripts/wizard/components/wizard-field-upload.js.es6
@@ -1,6 +1,6 @@
 import getUrl from "discourse-common/lib/get-url";
 import { getToken } from "wizard/lib/ajax";
-import I18n from "I18n";
+import WizardI18n from "../lib/wizard-i18n";
 
 export default Ember.Component.extend({
   classNames: ["wizard-field-upload"],
@@ -41,7 +41,7 @@ export default Ember.Component.extend({
     });
 
     $upload.on("fileuploadfail", (e, response) => {
-      let message = I18n.t("wizard.upload_error");
+      let message = WizardI18n("wizard.upload_error");
       if (response.jqXHR.responseJSON && response.jqXHR.responseJSON.errors) {
         message = response.jqXHR.responseJSON.errors.join("\n");
       }
diff --git a/assets/javascripts/wizard/components/wizard-text-field.js.es6 b/assets/javascripts/wizard/components/wizard-text-field.js.es6
index 8e4570a7..a05b84e6 100644
--- a/assets/javascripts/wizard/components/wizard-text-field.js.es6
+++ b/assets/javascripts/wizard/components/wizard-text-field.js.es6
@@ -2,7 +2,7 @@
 
 import computed from "discourse-common/utils/decorators";
 import { siteDir, isRTL, isLTR } from "discourse/lib/text-direction";
-import I18n from "I18n";
+import WizardI18n from "../lib/wizard-i18n";
 
 export default Ember.TextField.extend({
   attributeBindings: ['autocorrect', 'autocapitalize', 'autofocus', 'maxLength', 'dir'],
@@ -34,6 +34,6 @@ export default Ember.TextField.extend({
 
   @computed("placeholderKey")
   placeholder(placeholderKey) {
-    return placeholderKey ? I18n.t(placeholderKey) : "";
+    return placeholderKey ? WizardI18n(placeholderKey) : "";
   }
 });
diff --git a/assets/javascripts/wizard/helpers/wizard-i18n.js.es6 b/assets/javascripts/wizard/helpers/wizard-i18n.js.es6
new file mode 100644
index 00000000..f357cc5b
--- /dev/null
+++ b/assets/javascripts/wizard/helpers/wizard-i18n.js.es6
@@ -0,0 +1,6 @@
+import { registerUnbound } from 'discourse-common/lib/helpers';
+import WizardI18n from '../lib/wizard-i18n';
+
+export default registerUnbound("wizard-i18n", (key, params) => {
+  return WizardI18n(key, params);
+});
\ No newline at end of file
diff --git a/assets/javascripts/wizard/lib/wizard-i18n.js.es6 b/assets/javascripts/wizard/lib/wizard-i18n.js.es6
new file mode 100644
index 00000000..4d78bc7e
--- /dev/null
+++ b/assets/javascripts/wizard/lib/wizard-i18n.js.es6
@@ -0,0 +1,31 @@
+import I18n from "I18n";
+
+const getThemeId = () => {
+  let themeId = parseInt($("meta[name=discourse_theme_ids]")[0].content, 10);
+  
+  if (!isNaN(themeId)) {
+    return themeId.toString();
+  } else {
+    return null;
+  }
+}
+
+const translationExists = (key) => {
+  return I18n.findTranslation(key, { locale: I18n.locale }) ||
+    I18n.findTranslation(key, { locale: I18n.defaultLocale });
+} 
+
+const WizardI18n = (key, params={}) => {
+  const themeId = getThemeId();
+  if (!themeId) return I18n.t(key, params);
+  
+  const themeKey = `theme_translations.${themeId}.${key}`;
+    
+  if (translationExists(themeKey)) {
+    return I18n.t(themeKey, params);
+  } else {
+    return I18n.t(key, params);
+  }
+}
+
+export default WizardI18n; 
\ No newline at end of file
diff --git a/assets/javascripts/wizard/routes/custom-step.js.es6 b/assets/javascripts/wizard/routes/custom-step.js.es6
index 72dd5263..627da6a1 100644
--- a/assets/javascripts/wizard/routes/custom-step.js.es6
+++ b/assets/javascripts/wizard/routes/custom-step.js.es6
@@ -1,4 +1,4 @@
-import I18n from "I18n";
+import WizardI18n from "../lib/wizard-i18n";
 
 export default Ember.Route.extend({
   model(params) {
@@ -26,7 +26,7 @@ export default Ember.Route.extend({
     if (!model.permitted) {
       props['stepMessage'] = {
         state: 'not-permitted',
-        text: model.permitted_message || I18n.t('wizard.step_not_permitted')
+        text: model.permitted_message || WizardI18n('wizard.step_not_permitted')
       };
       if (model.index > 0) {
         props['showReset'] = true;
diff --git a/assets/javascripts/wizard/templates/components/wizard-composer-editor.hbs b/assets/javascripts/wizard/templates/components/wizard-composer-editor.hbs
index 5e6cdb7f..28c697ce 100644
--- a/assets/javascripts/wizard/templates/components/wizard-composer-editor.hbs
+++ b/assets/javascripts/wizard/templates/components/wizard-composer-editor.hbs
@@ -31,7 +31,7 @@
 
 {{#if isUploading}}
   <div id="file-uploading">
-    {{loading-spinner size="small"}}<span>{{i18n "upload_selector.uploading"}} {{uploadProgress}}%</span>
+    {{loading-spinner size="small"}}<span>{{wizard-i18n "upload_selector.uploading"}} {{uploadProgress}}%</span>
     {{#if isCancellable}}
       <a href id="cancel-file-upload" {{action "cancelUpload"}}>{{d-icon "times"}}</a>
     {{/if}}
diff --git a/assets/javascripts/wizard/templates/components/wizard-composer-hyperlink.hbs b/assets/javascripts/wizard/templates/components/wizard-composer-hyperlink.hbs
index 44a2495c..f5b7afb5 100644
--- a/assets/javascripts/wizard/templates/components/wizard-composer-hyperlink.hbs
+++ b/assets/javascripts/wizard/templates/components/wizard-composer-hyperlink.hbs
@@ -1,13 +1,13 @@
 <div class="wizard-composer-hyperlink-contents">
-  <h3>{{i18n "composer.link_dialog_title"}}</h3>
+  <h3>{{wizard-i18n "composer.link_dialog_title"}}</h3>
   {{input
     class="composer-link-name"
-    placeholder=(i18n 'composer.link_optional_text')
+    placeholder=(wizard-i18n 'composer.link_optional_text')
     type="text"
     value=linkName}}
   {{input
     class="composer-link-url"
-    placeholder=(i18n 'composer.link_url_placeholder')
+    placeholder=(wizard-i18n 'composer.link_url_placeholder')
     type="text"
     value=linkUrl}}
   {{d-button
diff --git a/assets/javascripts/wizard/templates/components/wizard-editor.hbs b/assets/javascripts/wizard/templates/components/wizard-editor.hbs
index 0033b34a..189920ff 100644
--- a/assets/javascripts/wizard/templates/components/wizard-editor.hbs
+++ b/assets/javascripts/wizard/templates/components/wizard-editor.hbs
@@ -27,7 +27,7 @@
               <button class='wizard-btn {{b.className}}' {{action b.action b}} title="{{b.title}}">
                 {{d-icon b.icon}}
                 {{#if b.label}}
-                  <span class="d-button-label">{{i18n b.label}}</span>
+                  <span class="d-button-label">{{wizard-i18n b.label}}</span>
                 {{/if}}
               </button>
             {{/if}}
diff --git a/assets/javascripts/wizard/templates/components/wizard-field-composer.hbs b/assets/javascripts/wizard/templates/components/wizard-field-composer.hbs
index db6f52cc..1fe2bde6 100644
--- a/assets/javascripts/wizard/templates/components/wizard-field-composer.hbs
+++ b/assets/javascripts/wizard/templates/components/wizard-field-composer.hbs
@@ -8,5 +8,5 @@
   afterRefresh=(action "afterRefresh")}}
 
 <button class='wizard-btn toggle-preview' {{action 'togglePreview'}}>
-  <span class="d-button-label">{{i18n togglePreviewLabel}}</span>
+  <span class="d-button-label">{{wizard-i18n togglePreviewLabel}}</span>
 </button>
\ No newline at end of file
diff --git a/assets/javascripts/wizard/templates/components/wizard-field-upload.hbs b/assets/javascripts/wizard/templates/components/wizard-field-upload.hbs
index bbe82f4c..20349e41 100644
--- a/assets/javascripts/wizard/templates/components/wizard-field-upload.hbs
+++ b/assets/javascripts/wizard/templates/components/wizard-field-upload.hbs
@@ -1,8 +1,8 @@
 <label class="wizard-btn wizard-btn-upload-file {{if uploading 'disabled'}}">
   {{#if uploading}}
-    {{i18n "wizard.uploading"}}
+    {{wizard-i18n "wizard.uploading"}}
   {{else}}
-    {{i18n "wizard.upload"}}
+    {{wizard-i18n "wizard.upload"}}
     {{d-icon "upload"}}
   {{/if}}
 
diff --git a/assets/javascripts/wizard/templates/components/wizard-no-access.hbs b/assets/javascripts/wizard/templates/components/wizard-no-access.hbs
index 2072c2c8..dd30042f 100644
--- a/assets/javascripts/wizard/templates/components/wizard-no-access.hbs
+++ b/assets/javascripts/wizard/templates/components/wizard-no-access.hbs
@@ -1,7 +1,7 @@
 <div>{{text}}</div>
 <div class="no-access-gutter">
   <button class='wizard-btn primary return-to-site' {{action 'skip'}}>
-    {{i18n 'wizard.return_to_site' siteName=siteName}}
+    {{wizard-i18n 'wizard.return_to_site' siteName=siteName}}
     {{d-icon "sign-out"}}
   </button>
 </div>
diff --git a/assets/javascripts/wizard/templates/components/wizard-step.hbs b/assets/javascripts/wizard/templates/components/wizard-step.hbs
index 0aedbac0..c8d3fee8 100644
--- a/assets/javascripts/wizard/templates/components/wizard-step.hbs
+++ b/assets/javascripts/wizard/templates/components/wizard-step.hbs
@@ -26,7 +26,7 @@
     <div class='white'></div>
     <div class='black' style={{barStyle}}></div>
     <div class='screen'></div>
-    <span>{{bound-i18n "wizard.step" current=step.displayIndex total=wizard.totalSteps}}</span>
+    <span>{{wizard-i18n "wizard.step" current=step.displayIndex total=wizard.totalSteps}}</span>
   </div>
 
   <div class='wizard-buttons'>
@@ -34,23 +34,23 @@
       {{loading-spinner size='small'}}
     {{else}}
       {{#if showQuitButton}}
-        <a href {{action "quit"}} class='action-link quit' tabindex="11">{{i18n "wizard.quit"}}</a>
+        <a href {{action "quit"}} class='action-link quit' tabindex="11">{{wizard-i18n "wizard.quit"}}</a>
       {{/if}}
       {{#if showBackButton}}
-        <a href {{action "backStep"}} class='action-link back' tabindex="11">{{i18n "wizard.back"}}</a>
+        <a href {{action "backStep"}} class='action-link back' tabindex="11">{{wizard-i18n "wizard.back"}}</a>
       {{/if}}
     {{/if}}
 
     {{#if showNextButton}}
       <button class='wizard-btn next primary' {{action "nextStep"}} disabled={{saving}} tabindex="10">
-        {{i18n "wizard.next"}}
+        {{wizard-i18n "wizard.next"}}
         {{d-icon "chevron-right"}}
       </button>
     {{/if}}
 
     {{#if showDoneButton}}
       <button class='wizard-btn done' {{action "done"}} disabled={{saving}} tabindex="10">
-        {{i18n "wizard.done"}}
+        {{wizard-i18n "wizard.done"}}
       </button>
     {{/if}}
   </div>
diff --git a/assets/javascripts/wizard/templates/custom.index.hbs b/assets/javascripts/wizard/templates/custom.index.hbs
index 6040d9b5..d233f45b 100644
--- a/assets/javascripts/wizard/templates/custom.index.hbs
+++ b/assets/javascripts/wizard/templates/custom.index.hbs
@@ -1,14 +1,14 @@
 {{#if noWizard}}
-  {{wizard-no-access text=(i18n 'wizard.none') wizardId=wizardId}}
+  {{wizard-no-access text=(wizard-i18n 'wizard.none') wizardId=wizardId}}
 {{else}}
   {{#if requiresLogin}}
-    {{wizard-no-access text=(i18n 'wizard.requires_login') wizardId=wizardId}}
+    {{wizard-no-access text=(wizard-i18n 'wizard.requires_login') wizardId=wizardId}}
   {{else}}
     {{#if notPermitted}}
-      {{wizard-no-access text=(i18n 'wizard.not_permitted') wizardId=wizardId}}
+      {{wizard-no-access text=(wizard-i18n 'wizard.not_permitted') wizardId=wizardId}}
     {{else}}
       {{#if completed}}
-        {{wizard-no-access text=(i18n 'wizard.completed') wizardId=wizardId}}
+        {{wizard-no-access text=(wizard-i18n 'wizard.completed') wizardId=wizardId}}
       {{/if}}
     {{/if}}
   {{/if}}
diff --git a/assets/javascripts/wizard/templates/custom.step.hbs b/assets/javascripts/wizard/templates/custom.step.hbs
index 3c26bf5c..039c8099 100644
--- a/assets/javascripts/wizard/templates/custom.step.hbs
+++ b/assets/javascripts/wizard/templates/custom.step.hbs
@@ -5,7 +5,7 @@
     </div>
     {{#if showReset}}
       <a class="reset-wizard" {{action "resetWizard"}}>
-        {{i18n 'wizard.reset'}}
+        {{wizard-i18n 'wizard.reset'}}
       </a>
     {{/if}}
   </div>
diff --git a/views/layouts/wizard.html.erb b/views/layouts/wizard.html.erb
index feaa041b..ea6d6f2a 100644
--- a/views/layouts/wizard.html.erb
+++ b/views/layouts/wizard.html.erb
@@ -19,6 +19,7 @@
     <%= csrf_meta_tags %>
 
     <%- unless customization_disabled? %>
+      <%= theme_translations_lookup %>
       <%= raw theme_lookup("head_tag") %>
     <%- end %>