diff --git a/chrome/content/zotero/preferences/preferences_sync.xul b/chrome/content/zotero/preferences/preferences_sync.xul
index 0e9cbd19de..85d247bc56 100644
--- a/chrome/content/zotero/preferences/preferences_sync.xul
+++ b/chrome/content/zotero/preferences/preferences_sync.xul
@@ -80,10 +80,9 @@
 									<row>
 										<box/>
 										<vbox>
-											<!-- TODO: localize -->
-											<checkbox label="Sync full-text content"
+											<checkbox label="&zotero.preferences.sync.syncFullTextContent;"
 												preference="pref-sync-fulltext-enabled"
-												tooltiptext="Zotero can sync the full-text content of files in your Zotero libraries with zotero.org and other linked devices, allowing you to easily search for your files wherever you are. The full-text content of your files will not be shared publicly."/>
+												tooltiptext="&zotero.preferences.sync.syncFullTextContent.desc;"/>
 										</vbox>
 									</row>
 									<!--
diff --git a/chrome/content/zotero/xpcom/sync.js b/chrome/content/zotero/xpcom/sync.js
index 3bfab061af..502d87b172 100644
--- a/chrome/content/zotero/xpcom/sync.js
+++ b/chrome/content/zotero/xpcom/sync.js
@@ -1381,16 +1381,12 @@ Zotero.Sync.Server = new function () {
 				+ ps.BUTTON_DELAY_ENABLE;
 			let index = ps.confirmEx(
 				null,
-				"New: Full-Text Content Syncing",
-				"Zotero can now sync the full-text content of files in your Zotero libraries "
-					+ "with zotero.org and other linked devices, allowing you to easily search for "
-					+ "your files wherever you are. The full-text content of your files will "
-					+ "not be shared publicly.\n\n"
-					+ "You can change this setting later from the Sync pane of the Zotero "
-					+ "preferences.",
+				Zotero.getString('sync.fulltext.upgradePrompt.title'),
+				Zotero.getString('sync.fulltext.upgradePrompt.text') + "\n\n"
+					+ Zotero.getString('sync.fulltext.upgradePrompt.changeLater'),
 				buttonFlags,
-				"Use Full-Text Syncing",
-				"Not Now",
+				Zotero.getString('sync.fulltext.upgradePrompt.enable'),
+				Zotero.getString('general.notNow'),
 				null, null, {}
 			);
 			
diff --git a/chrome/locale/en-US/zotero/preferences.dtd b/chrome/locale/en-US/zotero/preferences.dtd
index 111aa31b18..5ae63cf0d4 100644
--- a/chrome/locale/en-US/zotero/preferences.dtd
+++ b/chrome/locale/en-US/zotero/preferences.dtd
@@ -55,6 +55,8 @@
 <!ENTITY zotero.preferences.sync.createAccount						"Create Account">
 <!ENTITY zotero.preferences.sync.lostPassword						"Lost Password?">
 <!ENTITY zotero.preferences.sync.syncAutomatically					"Sync automatically">
+<!ENTITY zotero.preferences.sync.syncFullTextContent              "Sync full-text content">
+<!ENTITY zotero.preferences.sync.syncFullTextContent.desc         "Zotero can sync the full-text content of files in your Zotero libraries with zotero.org and other linked devices, allowing you to easily search for your files wherever you are. The full-text content of your files will not be shared publicly.">
 <!ENTITY zotero.preferences.sync.about								"About Syncing">
 <!ENTITY zotero.preferences.sync.fileSyncing						"File Syncing">
 <!ENTITY zotero.preferences.sync.fileSyncing.url					"URL:">
diff --git a/chrome/locale/en-US/zotero/zotero.properties b/chrome/locale/en-US/zotero/zotero.properties
index 340bcfbd9c..b739efeaa3 100644
--- a/chrome/locale/en-US/zotero/zotero.properties
+++ b/chrome/locale/en-US/zotero/zotero.properties
@@ -27,6 +27,7 @@ general.updateAvailable				= Update Available
 general.upgrade						= Upgrade
 general.yes							= Yes
 general.no							= No
+general.notNow                     = Not Now
 general.passed						= Passed
 general.failed						= Failed
 general.and							= and
@@ -811,6 +812,11 @@ sync.status.uploadingData			= Uploading data to sync server
 sync.status.uploadAccepted			= Upload accepted \u2014 waiting for sync server
 sync.status.syncingFiles			= Syncing files
 
+sync.fulltext.upgradePrompt.title       = New: Full-Text Content Syncing
+sync.fulltext.upgradePrompt.text        = Zotero can now sync the full-text content of files in your Zotero libraries with zotero.org and other linked devices, allowing you to easily search for your files wherever you are. The full-text content of your files will not be shared publicly.
+sync.fulltext.upgradePrompt.changeLater = You can change this setting later from the Sync pane of the Zotero preferences.
+sync.fulltext.upgradePrompt.enable      = Use Full-Text Syncing
+
 sync.storage.mbRemaining			= %SMB remaining
 sync.storage.kbRemaining			= %SKB remaining
 sync.storage.filesRemaining			= %1$S/%2$S files