diff --git a/src/controls/externalurl/externalurlSeveralButtons.js b/src/controls/externalurl/externalurlSeveralButtons.js
index 31c3f466c..a990a89b1 100644
--- a/src/controls/externalurl/externalurlSeveralButtons.js
+++ b/src/controls/externalurl/externalurlSeveralButtons.js
@@ -3,7 +3,13 @@ import { Component, Element as El, Button, dom } from '../../ui';
 import replacer from '../../utils/replacer';
 
 const externalurlSeveralButtons = function externalurlSeveralButtons(options = {}) {
-  const mainbuttonTooltipText = options.tooltipText || 'Visa kartan i en extern karttjänst';
+  const localization = options.localization;
+
+  function localize(key) {
+    return localization.getStringByKeys({ targetParentKey: 'externalurl', targetKey: key });
+  }
+
+  const mainbuttonTooltipText = options.tooltipText || localize('tooltipText');
   const links = options.links;
   const hasValidMethod = links.some(link => link.method !== 'none');
   let map;
@@ -79,7 +85,7 @@ const externalurlSeveralButtons = function externalurlSeveralButtons(options = {
       });
       buttons.push(externalUrlMainButton);
       links.forEach((link) => {
-        const tooltipText = link.tooltipText;
+        const tooltipText = link.tooltipText ? link.tooltipText : localize('linkTooltipText');
         const buttonImage = link.buttonImage || '#fa-external-link';
         const subButton = Button({
           cls: `o-measure-length padding-small ${subButtoncls} icon-smaller round light box-shadow hidden`,
diff --git a/src/controls/externalurl/externalurlSingleButton.js b/src/controls/externalurl/externalurlSingleButton.js
index 2d41e7c59..a8a910cb7 100644
--- a/src/controls/externalurl/externalurlSingleButton.js
+++ b/src/controls/externalurl/externalurlSingleButton.js
@@ -3,13 +3,19 @@ import { Component, Element as El, Button, dom } from '../../ui';
 import replacer from '../../utils/replacer';
 
 const ExternalurlSingleButton = function ExternalurlSingleButton(options = {}) {
+  const localization = options.localization;
+
+  function localize(key) {
+    return localization.getStringByKeys({ targetParentKey: 'externalurl', targetKey: key });
+  }
+
   let map;
   let viewer;
   let exUrlElement;
   let exUrlBtn;
   let target;
   const buttons = [];
-  const tooltip = options.links[0].tooltipText || options.tooltipText || 'Visa kartan i en extern karttjänst';
+  const tooltip = options.links[0].tooltipText || options.tooltipText || localize('tooltipText');
   const buttonImage = options.links[0].buttonImage || '#ic_baseline_link_24px';
   const url = options.links[0].url;
   const method = options.links[0].method;
@@ -17,7 +23,7 @@ const ExternalurlSingleButton = function ExternalurlSingleButton(options = {}) {
 
   function onClick() {
     if (!url) {
-      alert('No URL is specified in the configurations');
+      alert(localize('noUrl'));
       return;
     }
 
diff --git a/src/loc/en_US.json b/src/loc/en_US.json
index 79651d58a..101a8e61b 100644
--- a/src/loc/en_US.json
+++ b/src/loc/en_US.json
@@ -105,6 +105,16 @@
             "drawSquare": "Square",
             "drawCircle": "Circle",
             "drawFreehand": "Freehand"
+        },
+        "bookmarks": {
+            "title": "Bookmarks",
+            "close": "Close",
+            "bookmarkLabel": "Bookmark for"
+        },
+        "externalurl": {
+            "tooltipText": "Display the map in an external map service",
+            "noUrl": "No URL is specified in the configuration",
+            "linkTooltipText": "Open link"
         }
     },
     "style": {
@@ -146,10 +156,5 @@
             "pointTypeSquare": "Square",
             "pointTypeMarker": "Marker"
         }
-    },
-    "bookmarks": {
-        "title": "Bookmarks",
-        "close": "Close",
-        "bookmarkLabel": "Bookmark for"
     }
-}
\ No newline at end of file
+}
diff --git a/src/loc/sv_SE.json b/src/loc/sv_SE.json
index 9ca16cd03..4bd4c37b9 100644
--- a/src/loc/sv_SE.json
+++ b/src/loc/sv_SE.json
@@ -105,8 +105,17 @@
             "drawSquare": "Fyrkant",
             "drawCircle": "Cirkel",
             "drawFreehand": "Frihand"
+        },
+        "bookmarks": {
+            "title": "Bokmärken",
+            "close": "Stäng",
+            "bookmarkLabel": "Bokmärke för"
+        },
+        "externalurl": {
+            "tooltipText": "Visa kartan i en extern karttjänst",
+            "noUrl": "Ingen URL är angiven i konfigurationen",
+            "linkTooltipText": "Öppna länk"
         }
-
     },
     "style": {
         "drawStyles": {
@@ -147,10 +156,5 @@
             "pointTypeSquare": "Fyrkant",
             "pointTypeMarker": "Markör"
         }
-    },
-    "bookmarks": {
-        "title": "Bokmärken",
-        "close": "Stäng",
-        "bookmarkLabel": "Bokmärke för"
     }
-}
\ No newline at end of file
+}