Adding german and japanese translations

webapp/i18n/en.json

@@ -79,8 +79,10 @@
   "Sidebar.empty-board": "Empty board",
   "Sidebar.english": "English",
   "Sidebar.export-archive": "Export archive",
+  "Sidebar.german": "German",
   "Sidebar.import-archive": "Import archive",
   "Sidebar.invite-users": "Invite Users",
+  "Sidebar.japanese": "Japanese",
   "Sidebar.light-theme": "Light theme",
   "Sidebar.logout": "Log out",
   "Sidebar.no-views-in-board": "No pages inside",

webapp/i18n/ja.json

@@ -0,0 +1,2 @@
+{
+}

webapp/src/components/sidebar.tsx

@@ -327,6 +327,16 @@ class Sidebar extends React.Component<Props, State> {
                                 name={intl.formatMessage({id: 'Sidebar.spanish', defaultMessage: 'Spanish'})}
                                 onClick={async () => this.props.setLanguage('es')}
                             />
+                            <Menu.Text
+                                id='german-lang'
+                                name={intl.formatMessage({id: 'Sidebar.german', defaultMessage: 'German'})}
+                                onClick={async () => this.props.setLanguage('de')}
+                            />
+                            <Menu.Text
+                                id='japanese-lang'
+                                name={intl.formatMessage({id: 'Sidebar.japanese', defaultMessage: 'Japanese'})}
+                                onClick={async () => this.props.setLanguage('ja')}
+                            />
                         </Menu.SubMenu>
                         <Menu.SubMenu
                             id='theme'

webapp/src/i18n.tsx

@@ -3,9 +3,15 @@
 
 import messages_en from '../i18n/en.json'
 import messages_es from '../i18n/es.json'
+import messages_de from '../i18n/de.json'
+import messages_ja from '../i18n/ja.json'
 
 export function getMessages(lang: string): {[key: string]: string} {
     switch (lang) {
+    case 'de':
+        return messages_de
+    case 'ja':
+        return messages_ja
     case 'es':
         return messages_es
     }