diff --git a/src/i18n/en-US.properties b/src/i18n/en-US.properties
index 73b44ed6c..a65189b04 100644
--- a/src/i18n/en-US.properties
+++ b/src/i18n/en-US.properties
@@ -150,3 +150,23 @@ notification_annotation_mode=Click anywhere to add a comment to the document
 360_images=360-degree images
 # 3-dimensional model file type
 3d_models=3D models
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/lib/lang.js b/src/lib/lang.js
new file mode 100644
index 000000000..ed0807a9b
--- /dev/null
+++ b/src/lib/lang.js
@@ -0,0 +1,53 @@
+const languageMap = {
+    chi: __('chinese'),
+    zh: __('chinese'),
+    zho: __('chinese'),
+    da: __('danish'),
+    dan: __('danish'),
+    dut: __('dutch'),
+    nl: __('dutch'),
+    nld: __('dutch'),
+    en: __('english'),
+    eng: __('english'),
+    fi: __('finnish'),
+    fin: __('finnish'),
+    fr: __('french'),
+    fra: __('french'),
+    fre: __('french'),
+    de: __('german'),
+    deu: __('german'),
+    ger: __('german'),
+    he: __('hebrew'),
+    heb: __('hebrew'),
+    it: __('italian'),
+    ita: __('italian'),
+    ja: __('japanese'),
+    jpn: __('japanese'),
+    ko: __('korean'),
+    kor: __('korean'),
+    no: __('norwegian'),
+    nor: __('norwegian'),
+    pl: __('polish'),
+    pol: __('polish'),
+    por: __('portuguese'),
+    pt: __('portuguese'),
+    ru: __('russian'),
+    rus: __('russian'),
+    es: __('spanish'),
+    spa: __('spanish'),
+    sv: __('swedish'),
+    swe: __('swedish'),
+    tr: __('turkish'),
+    tur: __('turkish')
+};
+
+/**
+ * Returns a localized language name, given an ISO-639-1/2/3/5 code:
+ * https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes
+ *
+ * @param {string} iso639Code - a 2 or 3-char language code per https://en.wikipedia.org/wiki/List_of_ISO_639-2_codes
+ * @return {string} Returns the localized name of language represented by iso639Code
+ */
+export default function getLanguageName(iso639Code) {
+    return languageMap[iso639Code.toLowerCase()];
+}
diff --git a/src/lib/viewers/media/DashViewer.js b/src/lib/viewers/media/DashViewer.js
index 41ad4d018..d00ee7a0a 100644
--- a/src/lib/viewers/media/DashViewer.js
+++ b/src/lib/viewers/media/DashViewer.js
@@ -6,6 +6,7 @@ import { get } from '../../util';
 import { getRepresentation } from '../../file';
 import { MEDIA_STATIC_ASSETS_VERSION } from '../../constants';
 import './Dash.scss';
+import getLanguageName from '../../lang';
 
 const CSS_CLASS_DASH = 'bp-media-dash';
 const CSS_CLASS_HD = 'bp-media-controls-is-hd';
@@ -312,7 +313,7 @@ class DashViewer extends VideoBaseViewer {
     loadSubtitles() {
         this.textTracks = this.player.getTextTracks().sort((track1, track2) => track1.id - track2.id);
         if (this.textTracks.length > 0) {
-            this.mediaControls.initSubtitles(this.textTracks.map((track) => track.language));
+            this.mediaControls.initSubtitles(this.textTracks.map((track) => getLanguageName(track.language) || track.language));
         }
     }
     /**
diff --git a/src/lib/viewers/media/__tests__/DashViewer-test.js b/src/lib/viewers/media/__tests__/DashViewer-test.js
index d382dfebc..4c3b34e86 100644
--- a/src/lib/viewers/media/__tests__/DashViewer-test.js
+++ b/src/lib/viewers/media/__tests__/DashViewer-test.js
@@ -450,25 +450,67 @@ describe('lib/viewers/media/DashViewer', () => {
     });
 
     describe('loadSubtitles()', () => {
-        it('should initialize subtitles in sorted order if there are available subtitles', () => {
-            const english = { language: 'English', id: 5 };
-            const russian = { language: 'Russian', id: 4 };
-            const spanish = { language: 'Spanish', id: 6 };
-            const korean = { language: 'Korean', id: 3 };
-            const arabic = { language: 'Arabic', id: 7 };
+        it('should translate and initialize subtitles in sorted order if there are available subtitles', () => {
+            const english = { language: 'eng', id: 5 };
+            const russian = { language: 'rus', id: 4 };
+            const spanish = { language: 'spa', id: 6 };
+            const korean = { language: 'kor', id: 3 };
+            const chinese = { language: 'zho', id: 7 };
             const subs = [
                 english,
                 russian,
                 spanish,
                 korean,
-                arabic
+                chinese
             ];
             stubs.mockPlayer.expects('getTextTracks').returns(subs);
-            stubs.mockControls.expects('initSubtitles').withArgs(['Korean', 'Russian', 'English', 'Spanish', 'Arabic']);
+            stubs.mockControls.expects('initSubtitles').withArgs(['Korean', 'Russian', 'English', 'Spanish', 'Chinese']);
 
             dash.loadSubtitles();
 
-            expect(dash.textTracks).to.deep.equal([korean, russian, english, spanish, arabic]);
+            expect(dash.textTracks).to.deep.equal([korean, russian, english, spanish, chinese]);
+        });
+
+        it('should be robust to capital iso639 codes', () => {
+            const russian = { language: 'RUS', id: 3 };
+            const spanish = { language: 'spa', id: 4 };
+            const korean = { language: 'KoR', id: 5 };
+            const chinese = { language: 'zHO', id: 6 };
+            const subs = [
+                russian,
+                spanish,
+                korean,
+                chinese
+            ];
+            stubs.mockPlayer.expects('getTextTracks').returns(subs);
+            stubs.mockControls.expects('initSubtitles').withArgs(['Russian', 'Spanish', 'Korean', 'Chinese']);
+
+            dash.loadSubtitles();
+
+            expect(dash.textTracks).to.deep.equal([russian, spanish, korean, chinese]);
+        });
+
+        it('should pass through unrecognized codes', () => {
+            const russian = { language: 'rus', id: 3 };
+            const foo = { language: 'foo', id: 4 };
+            const und = { language: 'und', id: 5 };
+            const empty = { language: '', id: 6 };
+            const doesntmatter = { language: 'doesntmatter', id: 6 };
+            const zero = { language: '0', id: 7 };
+            const subs = [
+                russian,
+                foo,
+                und,
+                empty,
+                doesntmatter,
+                zero
+            ];
+            stubs.mockPlayer.expects('getTextTracks').returns(subs);
+            stubs.mockControls.expects('initSubtitles').withArgs(['Russian', 'foo', 'und', '', 'doesntmatter', '0']);
+
+            dash.loadSubtitles();
+
+            expect(dash.textTracks).to.deep.equal([russian, foo, und, empty, doesntmatter, zero]);
         });
 
         it('should do nothing if there are no available subtitles', () => {
@@ -482,10 +524,10 @@ describe('lib/viewers/media/DashViewer', () => {
 
     describe('handleSubtitle()', () => {
         it('should select track from front of text track list', () => {
-            const english = { language: 'English', id: 3 };
-            const russian = { language: 'Russian', id: 4 };
-            const french = { language: 'French', id: 5 };
-            const spanish = { language: 'Spanish', id: 6 };
+            const english = { language: 'eng', id: 3 };
+            const russian = { language: 'rus', id: 4 };
+            const french = { language: 'fra', id: 5 };
+            const spanish = { language: 'spa', id: 6 };
             dash.textTracks = [
                 english,
                 russian,
@@ -498,14 +540,14 @@ describe('lib/viewers/media/DashViewer', () => {
 
             dash.handleSubtitle();
 
-            expect(stubs.emit).to.be.calledWith('subtitlechange', 'English');
+            expect(stubs.emit).to.be.calledWith('subtitlechange', 'eng');
         });
 
         it('should select track from end of text track list', () => {
-            const english = { language: 'English', id: 3 };
-            const russian = { language: 'Russian', id: 4 };
-            const french = { language: 'French', id: 5 };
-            const spanish = { language: 'Spanish', id: 6 };
+            const english = { language: 'eng', id: 3 };
+            const russian = { language: 'rus', id: 4 };
+            const french = { language: 'fre', id: 5 };
+            const spanish = { language: 'spa', id: 6 };
             dash.textTracks = [
                 english,
                 russian,
@@ -518,14 +560,14 @@ describe('lib/viewers/media/DashViewer', () => {
 
             dash.handleSubtitle();
 
-            expect(stubs.emit).to.be.calledWith('subtitlechange', 'Spanish');
+            expect(stubs.emit).to.be.calledWith('subtitlechange', 'spa');
         });
 
         it('should select track from middle of text track list', () => {
-            const english = { language: 'English', id: 3 };
-            const russian = { language: 'Russian', id: 4 };
-            const french = { language: 'French', id: 5 };
-            const spanish = { language: 'Spanish', id: 6 };
+            const english = { language: 'eng', id: 3 };
+            const russian = { language: 'rus', id: 4 };
+            const french = { language: 'fre', id: 5 };
+            const spanish = { language: 'spa', id: 6 };
             dash.textTracks = [
                 english,
                 russian,
@@ -538,14 +580,14 @@ describe('lib/viewers/media/DashViewer', () => {
 
             dash.handleSubtitle();
 
-            expect(stubs.emit).to.be.calledWith('subtitlechange', 'Russian');
+            expect(stubs.emit).to.be.calledWith('subtitlechange', 'rus');
         });
 
         it('should turn off subtitles when idx out of bounds', () => {
-            const english = { language: 'English', id: 3 };
-            const russian = { language: 'Russian', id: 4 };
-            const french = { language: 'French', id: 5 };
-            const spanish = { language: 'Spanish', id: 6 };
+            const english = { language: 'eng', id: 3 };
+            const russian = { language: 'rus', id: 4 };
+            const french = { language: 'fre', id: 5 };
+            const spanish = { language: 'spa', id: 6 };
             dash.textTracks = [
                 english,
                 russian,