diff --git a/chrome/browser/resources/options/chromeos/language_hangul_options.html b/chrome/browser/resources/options/chromeos/language_hangul_options.html
index 699f72f7c82a80..12199670e19e68 100644
--- a/chrome/browser/resources/options/chromeos/language_hangul_options.html
+++ b/chrome/browser/resources/options/chromeos/language_hangul_options.html
@@ -5,7 +5,7 @@ <h1 i18n-content="languageHangulPage"></h1>
     <div class="option">
        <table class="option-control-table">
        <tr>
-         <td class="option-name" i18n-content="hangul_keyboard_layout"></td>
+         <td class="option-name" i18n-content="hangulKeyboardLayout"></td>
          <td class="option-value">
            <select id="keyboard-layout-select" class="control"
                 data-type="string"
diff --git a/chrome/browser/resources/options/language_add_language_overlay.html b/chrome/browser/resources/options/language_add_language_overlay.html
index 69349e436719bf..02f570f9fdff09 100644
--- a/chrome/browser/resources/options/language_add_language_overlay.html
+++ b/chrome/browser/resources/options/language_add_language_overlay.html
@@ -1,9 +1,8 @@
 <div id="add-language-overlay-page" class="page" hidden>
   <div class="close-button"></div>
-  <!-- TODO(kevers): Fix format of i18n-content labels -->
-  <h1 i18n-content="add_language_title"></h1>
+  <h1 i18n-content="addLanguageTitle"></h1>
   <div class="content-area">
-    <span i18n-content="add_language_select_label"></span>
+    <span i18n-content="addLanguageSelectLabel"></span>
     <select id="add-language-overlay-language-list"></select>
   </div>
   <div class="action-area button-strip">
diff --git a/chrome/browser/resources/options/language_add_language_overlay.js b/chrome/browser/resources/options/language_add_language_overlay.js
index c564c2d488b26f..f91d170922cf80 100644
--- a/chrome/browser/resources/options/language_add_language_overlay.js
+++ b/chrome/browser/resources/options/language_add_language_overlay.js
@@ -14,7 +14,7 @@ cr.define('options', function() {
    */
   function AddLanguageOverlay() {
     OptionsPage.call(this, 'addLanguage',
-                     loadTimeData.getString('add_button'),
+                     loadTimeData.getString('addButton'),
                      'add-language-overlay-page');
   }
 
diff --git a/chrome/browser/resources/options/language_options.html b/chrome/browser/resources/options/language_options.html
index b0af7b957da4b1..f82b9aa5cb6d6e 100644
--- a/chrome/browser/resources/options/language_options.html
+++ b/chrome/browser/resources/options/language_options.html
@@ -6,11 +6,10 @@ <h1 i18n-content="languagePage"></h1>
       <span>&nbsp;</span>
       <span class="link"><span class="link-color"></span></span>
     </div>
-    <!-- TODO(kevers): Fix format of i18n-content labels -->
     <div class="language-options-header">
-      <div i18n-content="add_language_instructions"></div>
+      <div i18n-content="addLanguageInstructions"></div>
 <if expr="pp_ifdef('chromeos')">
-      <div i18n-content="input_method_instructions"></div>
+      <div i18n-content="inputMethodInstructions"></div>
 </if>
     </div>
     <div class="language-options">
@@ -19,7 +18,7 @@ <h3 i18n-content="languages"></h3>
         <list id="language-options-list"></list>
         <div class="language-options-lower-left">
           <button id="language-options-add-button"
-            i18n-content="add_button">
+            i18n-content="addButton">
           </button>
         </div>
         <div id="language-options-list-dropmarker"></div>
@@ -32,42 +31,42 @@ <h3 id="language-options-language-name"></h3>
 <if expr="os == 'win32' or pp_ifdef('chromeos')">
         <div class="language-options-contents">
           <button id="language-options-ui-language-button"
-              i18n-content="display_in_this_language">
+              i18n-content="displayInThisLanguage">
           </button>
           <span id="language-options-ui-language-message" hidden></span>
         </div>
 </if>
         <div id="language-options-spellcheck" class="language-options-contents">
           <button id="language-options-spell-check-language-button"
-              i18n-content="use_this_for_spell_checking">
+              i18n-content="useThisForSpellChecking">
           </button>
           <span id="language-options-spell-check-language-message" hidden>
           </span>
           <span id="language-options-dictionary-downloading-message"
-              i18n-content="downloading_dictionary" hidden>
+              i18n-content="downloadingDictionary" hidden>
           </span>
         </div>
         <div id="language-options-dictionary-download-failed-message"
             class="language-options-notification" hidden>
-          <div i18n-content="download_failed"></div>
+          <div i18n-content="downloadFailed"></div>
           <div id="language-options-dictionary-download-fail-help-message"
-            i18n-content="download_fail_help" hidden>
+            i18n-content="downloadFailHelp" hidden>
           </div>
           <button id="dictionary-download-retry-button"
-              i18n-content="retry_button">
+              i18n-content="retryButton">
           </button>
         </div>
         <div id="language-options-ui-notification-bar"
              class="language-options-notification" hidden>
-          <div i18n-content="restart_required"></div>
+          <div i18n-content="restartRequired"></div>
 <if expr="pp_ifdef('chromeos')">
           <button id="language-options-ui-restart-button"
-                  i18n-content="restart_button">
+                  i18n-content="restartButton">
           </button>
 </if>
         </div>
 <if expr="pp_ifdef('chromeos')">
-        <h3 i18n-content="input_method"></h3>
+        <h3 i18n-content="inputMethod"></h3>
         <div id="language-options-input-method-template" class="input-method"
             hidden>
           <div class="checkbox">
@@ -89,8 +88,8 @@ <h3 i18n-content="input_method"></h3>
     </div>
     <div class="language-options-footer">
 <if expr="pp_ifdef('chromeos')">
-      <div i18n-content="switch_input_methods_hint"></div>
-      <div i18n-content="select_previous_input_method_hint"></div>
+      <div i18n-content="switchInputMethodsHint"></div>
+      <div i18n-content="selectPreviousInputMethodHint"></div>
       <button id="edit-dictionary-button"
           class="link-button standalone-link-button"
           i18n-content="languageDictionaryOverlayTitle"></button>
@@ -100,7 +99,7 @@ <h3 i18n-content="input_method"></h3>
         <label>
           <input id="enable-spell-check" pref="browser.enable_spellchecking"
               metric="Options_SpellCheck" type="checkbox">
-          <span i18n-content="enable_spell_check"></span>
+          <span i18n-content="enableSpellCheck"></span>
         </label>
         <button id="edit-dictionary-button" class="link-button"
             i18n-content="languageDictionaryOverlayTitle" hidden></button>
@@ -110,7 +109,7 @@ <h3 i18n-content="input_method"></h3>
           <input id="enable-auto-spell-correction"
               pref="browser.enable_autospellcorrect"
               metric="Options_AutoSpellCorrection" type="checkbox">
-          <span i18n-content="enable_auto_spell_correction"></span>
+          <span i18n-content="enableAutoSpellCorrection"></span>
         </label>
       </div>
 </if>
diff --git a/chrome/browser/resources/options/language_options.js b/chrome/browser/resources/options/language_options.js
index 2209d39a42939a..2c22741c6541ee 100644
--- a/chrome/browser/resources/options/language_options.js
+++ b/chrome/browser/resources/options/language_options.js
@@ -521,7 +521,7 @@ cr.define('options', function() {
 
       if (languageCode == this.prospectiveUiLanguageCode_) {
         uiLanguageMessage.textContent =
-            loadTimeData.getString('is_displayed_in_this_language');
+            loadTimeData.getString('isDisplayedInThisLanguage');
         showMutuallyExclusiveNodes(
             [uiLanguageButton, uiLanguageMessage, uiLanguageNotification], 1);
       } else if (languageCode in loadTimeData.getValue('uiLanguageCodeSet')) {
@@ -532,7 +532,7 @@ cr.define('options', function() {
           uiLanguageMessage.hidden = true;
         } else {
           uiLanguageButton.textContent =
-              loadTimeData.getString('display_in_this_language');
+              loadTimeData.getString('displayInThisLanguage');
           showMutuallyExclusiveNodes(
               [uiLanguageButton, uiLanguageMessage, uiLanguageNotification], 0);
           uiLanguageButton.onclick = function(e) {
@@ -541,7 +541,7 @@ cr.define('options', function() {
         }
       } else {
         uiLanguageMessage.textContent =
-            loadTimeData.getString('cannot_be_displayed_in_this_language');
+            loadTimeData.getString('cannotBeDisplayedInThisLanguage');
         showMutuallyExclusiveNodes(
             [uiLanguageButton, uiLanguageMessage, uiLanguageNotification], 1);
       }
@@ -574,7 +574,7 @@ cr.define('options', function() {
       if (languageCode == this.spellCheckDictionary_) {
         if (!(languageCode in this.spellcheckDictionaryDownloadStatus_)) {
           spellCheckLanguageMessage.textContent =
-              loadTimeData.getString('is_used_for_spell_checking');
+              loadTimeData.getString('isUsedForSpellChecking');
           showMutuallyExclusiveNodes(
               [spellCheckLanguageButton, spellCheckLanguageMessage], 1);
         } else if (this.spellcheckDictionaryDownloadStatus_[languageCode] ==
@@ -590,7 +590,7 @@ cr.define('options', function() {
       } else if (languageCode in
           loadTimeData.getValue('spellCheckLanguageCodeSet')) {
         spellCheckLanguageButton.textContent =
-            loadTimeData.getString('use_this_for_spell_checking');
+            loadTimeData.getString('useThisForSpellChecking');
         showMutuallyExclusiveNodes(
             [spellCheckLanguageButton, spellCheckLanguageMessage], 0);
         spellCheckLanguageButton.languageCode = languageCode;
@@ -599,7 +599,7 @@ cr.define('options', function() {
         spellCheckLanguageMessage.hidden = true;
       } else {
         spellCheckLanguageMessage.textContent =
-            loadTimeData.getString('cannot_be_used_for_spell_checking');
+            loadTimeData.getString('cannotBeUsedForSpellChecking');
         showMutuallyExclusiveNodes(
             [spellCheckLanguageButton, spellCheckLanguageMessage], 1);
       }
@@ -715,8 +715,8 @@ cr.define('options', function() {
       if (this.preloadEngines_.length == 1 && !checkbox.checked) {
         // Don't allow disabling the last input method.
         this.showNotification_(
-            loadTimeData.getString('please_add_another_input_method'),
-            loadTimeData.getString('ok_button'));
+            loadTimeData.getString('pleaseAddAnotherInputMethod'),
+            loadTimeData.getString('okButton'));
         checkbox.checked = true;
         return;
       }
diff --git a/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.cc b/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.cc
index 848ee2c9794bbb..a53a944fa9ca23 100644
--- a/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/cros_language_options_handler.cc
@@ -73,30 +73,30 @@ void CrosLanguageOptionsHandler::GetLocalizedValues(
 
   RegisterTitle(localized_strings, "languagePage",
                 IDS_OPTIONS_SETTINGS_LANGUAGES_AND_INPUT_DIALOG_TITLE);
-  localized_strings->SetString("ok_button", l10n_util::GetStringUTF16(IDS_OK));
+  localized_strings->SetString("okButton", l10n_util::GetStringUTF16(IDS_OK));
   localized_strings->SetString("configure",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_LANGUAGES_CONFIGURE));
-  localized_strings->SetString("input_method",
+  localized_strings->SetString("inputMethod",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_LANGUAGES_INPUT_METHOD));
-  localized_strings->SetString("please_add_another_input_method",
+  localized_strings->SetString("pleaseAddAnotherInputMethod",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_PLEASE_ADD_ANOTHER_INPUT_METHOD));
-  localized_strings->SetString("input_method_instructions",
+  localized_strings->SetString("inputMethodInstructions",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_INPUT_METHOD_INSTRUCTIONS));
-  localized_strings->SetString("switch_input_methods_hint",
+  localized_strings->SetString("switchInputMethodsHint",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_SWITCH_INPUT_METHODS_HINT));
-  localized_strings->SetString("select_previous_input_method_hint",
+  localized_strings->SetString("selectPreviousInputMethodHint",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_SELECT_PREVIOUS_INPUT_METHOD_HINT));
-  localized_strings->SetString("restart_button",
+  localized_strings->SetString("restartButton",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_SIGN_OUT_BUTTON));
-  localized_strings->SetString("extension_ime_label",
+  localized_strings->SetString("extensionImeLable",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_INPUT_METHOD_EXTENSION_IME));
-  localized_strings->SetString("extension_ime_description",
+  localized_strings->SetString("extensionImeDescription",
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_LANGUAGES_INPUT_METHOD_EXTENSION_DESCRIPTION));
   localized_strings->SetString("noInputMethods",
diff --git a/chrome/browser/ui/webui/options/chromeos/language_hangul_handler.cc b/chrome/browser/ui/webui/options/chromeos/language_hangul_handler.cc
index 4000291ff0efc5..50fad81af962f2 100644
--- a/chrome/browser/ui/webui/options/chromeos/language_hangul_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/language_hangul_handler.cc
@@ -26,7 +26,7 @@ void LanguageHangulHandler::GetLocalizedValues(
   RegisterTitle(localized_strings, "languageHangulPage",
                 IDS_OPTIONS_SETTINGS_LANGUAGES_HANGUL_SETTINGS_TITLE);
 
-  localized_strings->SetString("hangul_keyboard_layout",
+  localized_strings->SetString("hangulKeyboardLayout",
       l10n_util::GetStringUTF16(IDS_OPTIONS_SETTINGS_KEYBOARD_LAYOUT_TEXT));
 
   localized_strings->Set("HangulkeyboardLayoutList", GetKeyboardLayoutList());
diff --git a/chrome/browser/ui/webui/options/language_options_handler_common.cc b/chrome/browser/ui/webui/options/language_options_handler_common.cc
index af94af1774cd26..c191f3e443add5 100644
--- a/chrome/browser/ui/webui/options/language_options_handler_common.cc
+++ b/chrome/browser/ui/webui/options/language_options_handler_common.cc
@@ -44,50 +44,50 @@ void LanguageOptionsHandlerCommon::GetLocalizedValues(
     DictionaryValue* localized_strings) {
   DCHECK(localized_strings);
   static OptionsStringResource resources[] = {
-    { "add_button", IDS_OPTIONS_SETTINGS_LANGUAGES_ADD_BUTTON },
+    { "addButton", IDS_OPTIONS_SETTINGS_LANGUAGES_ADD_BUTTON },
     { "languages", IDS_OPTIONS_SETTINGS_LANGUAGES_LANGUAGES },
-    { "add_language_instructions",
+    { "addLanguageInstructions",
       IDS_OPTIONS_SETTINGS_LANGUAGES_ADD_LANGUAGE_INSTRUCTIONS },
-    { "cannot_be_displayed_in_this_language",
+    { "cannotBeDisplayedInThisLanguage",
       IDS_OPTIONS_SETTINGS_LANGUAGES_CANNOT_BE_DISPLAYED_IN_THIS_LANGUAGE,
       IDS_PRODUCT_NAME },
-    { "is_displayed_in_this_language",
+    { "isDisplayedInThisLanguage",
       IDS_OPTIONS_SETTINGS_LANGUAGES_IS_DISPLAYED_IN_THIS_LANGUAGE,
       IDS_PRODUCT_NAME },
-    { "display_in_this_language",
+    { "displayInThisLanguage",
       IDS_OPTIONS_SETTINGS_LANGUAGES_DISPLAY_IN_THIS_LANGUAGE,
       IDS_PRODUCT_NAME },
-    { "restart_required", IDS_OPTIONS_RELAUNCH_REQUIRED },
+    { "restartRequired", IDS_OPTIONS_RELAUNCH_REQUIRED },
   // OS X uses the OS native spellchecker so no need for these strings.
 #if !defined(OS_MACOSX)
-    { "use_this_for_spell_checking",
+    { "useThisForSpellChecking",
       IDS_OPTIONS_SETTINGS_USE_THIS_FOR_SPELL_CHECKING },
-    { "cannot_be_used_for_spell_checking",
+    { "cannotBeUsedForSpellChecking",
       IDS_OPTIONS_SETTINGS_CANNOT_BE_USED_FOR_SPELL_CHECKING },
-    { "is_used_for_spell_checking",
+    { "isUsedForSpellChecking",
       IDS_OPTIONS_SETTINGS_IS_USED_FOR_SPELL_CHECKING },
-    { "enable_spell_check", IDS_OPTIONS_ENABLE_SPELLCHECK },
-    { "enable_auto_spell_correction",
+    { "enableSpellCheck", IDS_OPTIONS_ENABLE_SPELLCHECK },
+    { "enableAutoSpellCorrection",
       IDS_OPTIONS_ENABLE_AUTO_SPELL_CORRECTION },
-    { "downloading_dictionary", IDS_OPTIONS_DICTIONARY_DOWNLOADING },
-    { "download_failed", IDS_OPTIONS_DICTIONARY_DOWNLOAD_FAILED },
-    { "retry_button", IDS_OPTIONS_DICTIONARY_DOWNLOAD_RETRY },
-    { "download_fail_help", IDS_OPTIONS_DICTIONARY_DOWNLOAD_FAIL_HELP },
+    { "downloadingDictionary", IDS_OPTIONS_DICTIONARY_DOWNLOADING },
+    { "downloadFailed", IDS_OPTIONS_DICTIONARY_DOWNLOAD_FAILED },
+    { "retryButton", IDS_OPTIONS_DICTIONARY_DOWNLOAD_RETRY },
+    { "downloadFailHelp", IDS_OPTIONS_DICTIONARY_DOWNLOAD_FAIL_HELP },
 #endif  // !OS_MACOSX
-    { "add_language_title", IDS_OPTIONS_LANGUAGES_ADD_TITLE },
-    { "add_language_select_label", IDS_OPTIONS_LANGUAGES_ADD_SELECT_LABEL },
-    { "restart_button", IDS_OPTIONS_SETTINGS_LANGUAGES_RELAUNCH_BUTTON }
+    { "addLanguageTitle", IDS_OPTIONS_LANGUAGES_ADD_TITLE },
+    { "addLanguageSelectLabel", IDS_OPTIONS_LANGUAGES_ADD_SELECT_LABEL },
+    { "restartButton", IDS_OPTIONS_SETTINGS_LANGUAGES_RELAUNCH_BUTTON }
   };
 
 #if defined(ENABLE_SETTINGS_APP)
   static OptionsStringResource app_resources[] = {
-    { "cannot_be_displayed_in_this_language",
+    { "cannotBeDisplayedInThisLanguage",
       IDS_OPTIONS_SETTINGS_LANGUAGES_CANNOT_BE_DISPLAYED_IN_THIS_LANGUAGE,
       IDS_SETTINGS_APP_LAUNCHER_PRODUCT_NAME },
-    { "is_displayed_in_this_language",
+    { "isDisplayedInThisLanguage",
       IDS_OPTIONS_SETTINGS_LANGUAGES_IS_DISPLAYED_IN_THIS_LANGUAGE,
       IDS_SETTINGS_APP_LAUNCHER_PRODUCT_NAME },
-    { "display_in_this_language",
+    { "displayInThisLanguage",
       IDS_OPTIONS_SETTINGS_LANGUAGES_DISPLAY_IN_THIS_LANGUAGE,
       IDS_SETTINGS_APP_LAUNCHER_PRODUCT_NAME },
   };