diff --git a/cinera/cinera.c b/cinera/cinera.c
index d45ba56..c3e9530 100644
--- a/cinera/cinera.c
+++ b/cinera/cinera.c
@@ -23,7 +23,7 @@ typedef struct
 version CINERA_APP_VERSION = {
     .Major = 0,
     .Minor = 10,
-    .Patch = 19
+    .Patch = 20
 };
 
 #define __USE_XOPEN2K8 // NOTE(matt): O_NOFOLLOW
@@ -1451,6 +1451,7 @@ file credits this person for the entire project, but indexers may \"uncredit\" p
 file credits this person for the entire project, but indexers may \"uncredit\" people in the [video] node of a HMML file." },
     { "css_path", "Path relative to assets_root_dir and assets_root_url where CSS files are located." },
     { "db_location", "Absolute file path where the database file resides. If you run multiple instances of Cinera on the same machine, please ensure this db_location differs between them." },
+    { "default_cc_lang", "The ISO 639-1 language code of the closed captions to enable by default. May be overridden by setting the cc_lang in the video node of an HMML file." },
     { "default_medium", "The ID of a medium (see also medium) which will be the default for the project. May be overridden by setting the medium in the video node of an HMML file." },
     { "deny", "See allow." },
     { "deny_bespoke_templates", "Indexers may use the \"template\" attribute in the video node of an .hmml file to set a bespoke template for that entry, superseding any configured player_template. Setting \"deny_bespoke_templates\" to true prevents this." },
@@ -1586,6 +1587,7 @@ typedef enum
     IDENT_CREDIT,
     IDENT_CSS_PATH,
     IDENT_DB_LOCATION,
+    IDENT_DEFAULT_CC_LANG,
     IDENT_DEFAULT_MEDIUM,
     IDENT_DENY,
     IDENT_DENY_BESPOKE_TEMPLATES,
@@ -1963,18 +1965,14 @@ ConfigError(string *Filename, uint64_t LineNumber, severity Severity, char *Mess
 
 void
 ConfigErrorField(string *Filename, uint64_t LineNumber, severity Severity, config_identifier_id FieldID,
-        char *Message, string *Received)
+        string *Received, char *Message)
 {
     ErrorFilenameAndLineNumber(Filename, LineNumber, Severity, ED_CONFIG);
     fprintf(stderr,
-            "Faulty %s%s%s %s",
+            "%s%s%s value %s%.*s%s %s\n",
             ColourStrings[CS_YELLOW_BOLD], ConfigIdentifiers[FieldID].String, ColourStrings[CS_END],
+            ColourStrings[CS_MAGENTA_BOLD], (int)Received->Length, Received->Base, ColourStrings[CS_END],
             Message);
-    if(Received)
-    {
-        PrintStringC(CS_MAGENTA_BOLD, *Received);
-    }
-    fprintf(stderr, "\n");
 }
 
 void
@@ -2139,6 +2137,25 @@ IndexingErrorClash(string *Filename, uint64_t LineNumber, severity Severity, cha
     fprintf(stderr, "\n");
 }
 
+void
+PrintValidLanguageCodeChars(void)
+{
+    fprintf(stderr,
+            "    Valid characters:\n"
+            "     a to z\n"
+            "     A to Z\n"
+            "     0 to 9\n"
+            "     - (hyphen)\n");
+}
+
+void
+IndexingErrorInvalidLanguageCode(string *Filename, uint64_t LineNumber, char *Key, string Received)
+{
+    ErrorFilenameAndLineNumber(Filename, LineNumber, S_ERROR, ED_INDEXING);
+    fprintf(stderr, "%s value %s%.*s%s contains invalid character(s)\n",
+            Key, ColourStrings[CS_MAGENTA_BOLD], (int)Received.Length, Received.Base, ColourStrings[CS_END]);
+}
+
 void
 IndexingErrorInvalidSubstring(string *Filename, uint64_t LineNumber, char *Key, string Received, string InvalidSubstring)
 {
@@ -2481,6 +2498,23 @@ IsValidIdentifierCharacter(char C)
     return ((C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z') || C == '_' || C == '-');
 }
 
+bool
+IsValidLanguageCode(string S)
+{
+    // TODO(matt): Add an upper limit to the length
+    bool Result = TRUE;
+    for(int i = 0; i < S.Length; ++i)
+    {
+        char C = S.Base[i];
+        if(!((C >= '0' && C <= '9') || (C >= 'a' && C <= 'z') || (C >= 'A' && C <= 'Z') || C == '-'))
+        {
+            Result = FALSE;
+            break;
+        }
+    }
+    return Result;
+}
+
 bool
 IsNumber(char C)
 {
@@ -11054,6 +11088,18 @@ HMMLToBuffers(buffers *CollationBuffers, template *BespokeTemplate, string BaseF
                     }
                 }
 
+                string CCLang = CurrentProject->DefaultCCLang;
+                if(HMML.metadata.cc_lang)
+                {
+                    CCLang = Wrap0(HMML.metadata.cc_lang);
+                    if(!IsValidLanguageCode(CCLang))
+                    {
+                        IndexingErrorInvalidLanguageCode(&FilepathL, 0, "cc_lang", CCLang);
+                        PrintValidLanguageCodeChars();
+                        Result = RC_ERROR_HMML;
+                    }
+                }
+
                 string OutputLocation = {};
                 if(!HMML.metadata.output)
                 {
@@ -11230,8 +11276,17 @@ HMMLToBuffers(buffers *CollationBuffers, template *BespokeTemplate, string BaseF
 
                         CopyStringToBuffer(&PlayerBuffers.Main,
                                 "<div class=\"cineraPlayerContainer\">\n"
-                                "            <div class=\"video_container\" data-platform=\"%s\" data-videoId=\"%s\"></div>\n"
-                                "            <div class=\"markers_container %.*s\">\n", VODPlatformStrings[CollationBuffers->VODPlatform], HMML.metadata.id, (int)CurrentProject->Theme.Length, CurrentProject->Theme.Base);
+                                "            <div class=\"video_container\" data-platform=\"%s\" data-videoId=\"%s\"", VODPlatformStrings[CollationBuffers->VODPlatform], HMML.metadata.id);
+
+                        if(CCLang.Length > 0)
+                        {
+                            CopyStringToBuffer(&PlayerBuffers.Main,
+                                    " data-ccLang=\"%.*s\"", (int)CCLang.Length, CCLang.Base);
+                        }
+
+                        CopyStringToBuffer(&PlayerBuffers.Main,
+                                "></div>\n"
+                                "            <div class=\"markers_container %.*s\">\n", (int)CurrentProject->Theme.Length, CurrentProject->Theme.Base);
 
                         if(N)
                         {
diff --git a/cinera/cinera_config.c b/cinera/cinera_config.c
index 5936b56..8828196 100644
--- a/cinera/cinera_config.c
+++ b/cinera/cinera_config.c
@@ -526,6 +526,7 @@ typedef struct project
     string TemplatesDir;
     string SearchTemplatePath;
     string PlayerTemplatePath;
+    string DefaultCCLang;
 
     string BaseDir;
     string BaseURL;
@@ -918,6 +919,7 @@ InitTypeSpecs(void)
     PushTypeSpecField(Root, FT_STRING, IDENT_COHOST, FALSE);
     PushTypeSpecField(Root, FT_STRING, IDENT_CSS_PATH, TRUE);
     PushTypeSpecField(Root, FT_STRING, IDENT_DB_LOCATION, TRUE);
+    PushTypeSpecField(Root, FT_STRING, IDENT_DEFAULT_CC_LANG, TRUE);
     PushTypeSpecField(Root, FT_STRING, IDENT_DEFAULT_MEDIUM, TRUE);
     PushTypeSpecField(Root, FT_STRING, IDENT_GENRE, TRUE);
     PushTypeSpecField(Root, FT_STRING, IDENT_GLOBAL_SEARCH_DIR, TRUE);
@@ -1018,6 +1020,7 @@ InitTypeSpecs(void)
     config_type_spec *Project = PushTypeSpec(&Result, IDENT_PROJECT, TRUE);
     PushTypeSpecField(Project, FT_STRING, IDENT_BASE_DIR, TRUE);
     PushTypeSpecField(Project, FT_STRING, IDENT_BASE_URL, TRUE);
+    PushTypeSpecField(Project, FT_STRING, IDENT_DEFAULT_CC_LANG, TRUE);
     PushTypeSpecField(Project, FT_STRING, IDENT_DEFAULT_MEDIUM, TRUE);
     PushTypeSpecField(Project, FT_STRING, IDENT_GENRE, TRUE);
     PushTypeSpecField(Project, FT_STRING, IDENT_HMML_DIR, TRUE);
@@ -3491,16 +3494,16 @@ PushPersonOntoConfig(config *C, resolution_errors *E, config_verifiers *V, scope
             if(QuotemarkCount == 1)
             {
                 string Filepath = Wrap0(Pair->Position.Filename);
-                ConfigErrorField(&Filepath, Pair->Position.LineNumber, S_ERROR, IDENT_NAME,
-                        "contains unpaired quotation mark: ", &This->Name);
+                ConfigErrorField(&Filepath, Pair->Position.LineNumber, S_ERROR, IDENT_NAME, &This->Name,
+                        "contains unpaired quotation mark");
                 PushError(E, S_ERROR, 0, Pair->Key);
                 NamingError = TRUE;
             }
             else if(QuotemarkCount > 2)
             {
                 string Filepath = Wrap0(Pair->Position.Filename);
-                ConfigErrorField(&Filepath, Pair->Position.LineNumber, S_ERROR, IDENT_NAME,
-                        "contains more than one pair of quotation marks: ", &This->Name);
+                ConfigErrorField(&Filepath, Pair->Position.LineNumber, S_ERROR, IDENT_NAME, &This->Name,
+                        "contains more than one pair of quotation marks");
                 PushError(E, S_ERROR, 0, Pair->Key);
                 NamingError = TRUE;
             }
@@ -3744,6 +3747,17 @@ PushProject(config *C, resolution_errors *E, config_verifiers *V, project *P, sc
         switch(This->Key)
         {
             // NOTE(matt): String
+            case IDENT_DEFAULT_CC_LANG:
+                {
+                    P->DefaultCCLang = ResolveString(C, E, ProjectTree, This, FALSE);
+                    if(!IsValidLanguageCode(P->DefaultCCLang))
+                    {
+                        ConfigErrorField(&Filepath, This->Position.LineNumber, S_ERROR, This->Key, &P->DefaultCCLang,
+                                "contains invalid character(s)");
+                        PrintValidLanguageCodeChars();
+                        PushError(E, S_ERROR, 0, This->Key);
+                    }
+                } break;
             case IDENT_DEFAULT_MEDIUM:
                 { P->DefaultMedium = GetMediumFromProject(P, This->String); } break;
             case IDENT_HMML_DIR:
@@ -4801,6 +4815,7 @@ PrintProject(config *C, project *P, typography *T, int Ancestors, int Indentatio
 
     TypesetPair(T, Generation, IDENT_TITLE, P->Title, AvailableColumns);
     TypesetPair(T, Generation, IDENT_HTML_TITLE, P->HTMLTitle, AvailableColumns);
+    TypesetPair(T, Generation, IDENT_DEFAULT_CC_LANG, P->DefaultCCLang.Length ? P->DefaultCCLang : EmptyString(), AvailableColumns);
     TypesetPair(T, Generation, IDENT_DEFAULT_MEDIUM, P->DefaultMedium ? P->DefaultMedium->ID : EmptyString(), AvailableColumns);
 
     TypesetPair(T, Generation, IDENT_HMML_DIR, P->HMMLDir, AvailableColumns);
diff --git a/cinera/cinera_player_pre.js b/cinera/cinera_player_pre.js
index ca66876..98adc52 100644
--- a/cinera/cinera_player_pre.js
+++ b/cinera/cinera_player_pre.js
@@ -965,10 +965,19 @@ Player.prototype.onPlatformReady = function() {
             {
                 this.videoContainer.style.position = "relative";
                 this.videoContainer.style.alignSelf = "unset";
-                this.platformPlayer = new Vimeo.Player(platformPlayerDiv.id, {
+
+                var CallData = {
                     id: this.videoContainer.getAttribute("data-videoId"),
                     title: false,
-                });
+                };
+                var CCLang = this.videoContainer.getAttribute("data-ccLang");
+                if(CCLang != null)
+                {
+                    CallData.texttrack = CCLang;
+                }
+
+                this.platformPlayer = new Vimeo.Player(platformPlayerDiv.id, CallData);
+
                 this.platformPlayer.ready()
                     .then(this.onPlatformPlayerReady.bind(this));
                 this.platformPlayer.on("playbackratechange", this.onVimeoPlayerPlaybackRateChange.bind(this));
@@ -980,7 +989,7 @@ Player.prototype.onPlatformReady = function() {
             } break;
         case vod_platform.YOUTUBE:
             {
-                this.platformPlayer = new YT.Player(platformPlayerDiv.id, {
+                var CallData = {
                     videoId: this.videoContainer.getAttribute("data-videoId"),
                     width: this.videoContainer.offsetWidth,
                     height: this.videoContainer.offsetWidth / 16 * 9,
@@ -990,7 +999,15 @@ Player.prototype.onPlatformReady = function() {
                         "onStateChange": this.onYouTubePlayerStateChange.bind(this),
                         "onPlaybackRateChange": this.onYouTubePlayerPlaybackRateChange.bind(this)
                     }
-                });
+                };
+                var CCLang = this.videoContainer.getAttribute("data-ccLang");
+                if(CCLang != null)
+                {
+                    CallData.cc_lang_pref = CCLang;
+                    CallData.cc_load_policy = 1;
+                }
+
+                this.platformPlayer = new YT.Player(platformPlayerDiv.id, CallData);
             } break;
     }
 };
diff --git a/hmmlib2/hmmlib.h b/hmmlib2/hmmlib.h
index d9ce48d..6591f1c 100644
--- a/hmmlib2/hmmlib.h
+++ b/hmmlib2/hmmlib.h
@@ -25,6 +25,7 @@ typedef struct {
     char* template;
     char* medium;
     char* number;
+    char* cc_lang;
 
     HMML_Credit* credits;
     size_t credit_count;
@@ -737,6 +738,7 @@ static void _hmml_parse_video(struct _hmml_parser* p)
         { HSTR("medium")         , &p->out.metadata.medium },
         { HSTR("number")         , &p->out.metadata.number },
         { HSTR("output")         , &p->out.metadata.output },
+        { HSTR("cc_lang")        , &p->out.metadata.cc_lang },
     };
 
     for(;;) {
@@ -822,7 +824,7 @@ void hmml_free(HMML_Output* out)
 }
 
 const struct HMML_Version hmml_version = {
-    2, 0, 13
+    2, 0, 14
 };
 
 #undef HSTX