diff --git a/_locales/en/messages.json b/_locales/en/messages.json
new file mode 100644
index 0000000..82afa5d
--- /dev/null
+++ b/_locales/en/messages.json
@@ -0,0 +1,108 @@
+{
+	"extensionName": {
+		"message": "Shellfox",
+		"description": "Name of the extension."
+	},
+
+	"extensionDescription": {
+		"message": "Run command-line programs from Firefox, easily.",
+		"description": "Description of the extension."
+	},
+
+	"pageActionName": {
+		"message": "Run shell command",
+		"description": "Name of address-bar button for running the default command on current page."
+	},
+
+	"pageCommandContextMenu": {
+		"message": "Run command “$COMMAND$”",
+		"description": "Menu-item to run a specific command on the current page.",
+		"placeholders": {
+			"command": {
+				"content": "$1",
+				"example": "Curl"
+			}
+		}
+	},
+
+	"pageCommandDefaultContextMenu": {
+		"message": "Run default shell command",
+		"description": "Menu-item to run the default command on the current page."
+	},
+
+	"linkCommandContextMenu": {
+		"message": "Run “$COMMAND$” on link",
+		"description": "Menu-item to run a specific command on a link’s URL.",
+		"placeholders": {
+			"command": {
+				"content": "$1",
+				"example": "Curl"
+			}
+		}
+	},
+
+	"linkCommandDefaultContextMenu": {
+		"message": "Run default command on link",
+		"description": "Menu-item to run the default command on a link’s URL."
+	},
+
+	"optionsTitleShell": {
+		"message": "Shell commands",
+		"description": "Title of options-page section for commands."
+	},
+
+	"optionsDescShell": {
+		"message": "Add shell commands, to be executed with a page’s URL as its argument. In a command, $URL will be replaced with the target page’s URL.",
+		"description": "Description of options-page section for commands."
+	},
+
+	"optionsHeadShellName": {
+		"message": "Name",
+		"description": "Header of table-element for options-page section for commands."
+	},
+
+	"optionsHeadShellCommand": {
+		"message": "Shell command",
+		"description": "Header of table-element for options-page section for commands."
+	},
+
+	"optionsPlaceholderName": {
+		"message": "Curl",
+		"description": "Displayed placeholder for options-page input for command-name."
+	},
+
+	"optionsPlaceholderCommand": {
+		"message": "curl $URL > /tmp/downloaded.html",
+		"description": "Displayed placeholder for options-page input for command."
+	},
+
+	"optionsTitleRule": {
+		"message": "URL/Page rules",
+		"description": "Title of options-page section for regex."
+	},
+
+	"optionsDescRule": {
+		"message": "Associate the above commands with URLs, based on regex rules. When a URL is tied to a command, a button will appear in context-menus and the address bar to run said command.",
+		"description": "Description of options-page section for regex."
+	},
+
+	"optionsHeadRuleName": {
+		"message": "URL regex",
+		"description": "Header of table-element for options-page section for regex."
+	},
+
+	"optionsHeadRuleCommand": {
+		"message": "Shell command",
+		"description": "Header of table-element for options-page section for regex."
+	},
+
+	"optionsPlaceholderRule": {
+		"message": "https://example.com/.*",
+		"description": "Displayed placeholder for options-page input for regex."
+	},
+
+	"optionsSaveButton": {
+		"message": "Apply",
+		"description": "Name of button in options-page to save changes."
+	}
+}
diff --git a/_locales/eo/messages.json b/_locales/eo/messages.json
new file mode 100644
index 0000000..e626f97
--- /dev/null
+++ b/_locales/eo/messages.json
@@ -0,0 +1,108 @@
+{
+	"extensionName": {
+		"message": "Ŝelvulpo",
+		"description": "Nomo de la aldonaĵo."
+	},
+
+	"extensionDescription": {
+		"message": "Ruli ŝel-ordonojn de Firefox, facile.",
+		"description": "Priskribo de la aldonaĵo."
+	},
+
+	"pageActionName": {
+		"message": "Ruli ŝel-ordonon",
+		"description": "Nomo de butono por ruli la implicitan ordonon de la nuna paĝo."
+	},
+
+	"pageCommandContextMenu": {
+		"message": "Ruli ordonon «$COMMAND$»",
+		"description": "Menuero por ruli specifan ordonon je la nuna paĝo.",
+		"placeholders": {
+			"command": {
+				"content": "$1",
+				"example": "Curl"
+			}
+		}
+	},
+
+	"pageCommandDefaultContextMenu": {
+		"message": "Ruli implicitan ŝel-ordonon",
+		"description": "Menuero por ruli la implicitan ordonon je la nuna paĝo."
+	},
+
+	"linkCommandContextMenu": {
+		"message": "Ruli «$COMMAND$» je ligilo",
+		"description": "Menuero por ruli specifan ordonon je ligilo.",
+		"placeholders": {
+			"command": {
+				"content": "$1",
+				"example": "Curl"
+			}
+		}
+	},
+
+	"linkCommandDefaultContextMenu": {
+		"message": "Ruli implicitan ordonon je ligilo",
+		"description": "Menuero por ruli la implicitan ordonon je ligilo."
+	},
+
+	"optionsTitleShell": {
+		"message": "Ŝel-ordonoj",
+		"description": "Titolo de agordo-parto por ordonoj."
+	},
+
+	"optionsDescShell": {
+		"message": "Alondi ŝel-ordonojn kiuj ruliĝas kun la URL de paĝo kiel parametro. En ordono, «$URL» anstataŭiĝos per tiu URL.",
+		"description": "Priskribo de agordo-parto por ordonoj."
+	},
+
+	"optionsHeadShellName": {
+		"message": "Nomo",
+		"description": "Titolo de tabelo-kolumno por agordo-parto por ordonoj."
+	},
+
+	"optionsHeadShellCommand": {
+		"message": "Ŝel-ordono",
+		"description": "Titolo de tabelo-kolumno por agordo-parto por ordonoj."
+	},
+
+	"optionsPlaceholderName": {
+		"message": "Curl",
+		"description": "Provizora valoro ĉe agordopaĝo por enigo de ordononomo."
+	},
+
+	"optionsPlaceholderCommand": {
+		"message": "curl $URL > /tmp/elŝutite.html",
+		"description": "Provizora valoro ĉe agordopaĝo por enigo de ordono."
+	},
+
+	"optionsTitleRule": {
+		"message": "URL/Paĝo-reguloj",
+		"description": "Titolo de agordo-parto por regulaj esprimoj."
+	},
+
+	"optionsDescRule": {
+		"message": "Ligi la suprajn ŝel-ordonojn al URLoj, laŭ regulaj esprimoj. Se URL estas ligita al ordono, butono aperiĝos en la supra breto por ruli ĝin.",
+		"description": "Priskribo de agordo-parto por regulaj esprimoj."
+	},
+
+	"optionsHeadRuleName": {
+		"message": "URL regula esprimo",
+		"description": "Titolo de tabelo-kolumno ĉe agordo-parto por regulaj esprimoj."
+	},
+
+	"optionsHeadRuleCommand": {
+		"message": "Ŝel-ordonoj",
+		"description": "Titolo de tabelo-kolumno ĉe agordo-parto por regulaj esprimoj."
+	},
+
+	"optionsPlaceholderRule": {
+		"message": "https://ekzemplo.org/.*",
+		"description": "Provizora valoro ĉe agordopaĝo por enigo de reteja regula esprimo."
+	},
+
+	"optionsSaveButton": {
+		"message": "Konservi",
+		"description": "Nomo de butono ĉe agordopaĝo por konservi ŝanĝojn."
+	}
+}
diff --git a/background.js b/background.js
index 1e415de..8906b13 100644
--- a/background.js
+++ b/background.js
@@ -12,12 +12,10 @@ function initShellfoxProgram() {
 
 // Given the name of an array saved to localStorage, return it (if possible).
 function savedArray(name) {
-	let saved = [];
 	try {
-		saved = JSON.parse(localStorage.getItem(name));
+		let saved = JSON.parse(localStorage.getItem(name));
 		return saved;
-	} catch { };
-	return saved;
+	} catch { return []; };
 }
 
 
@@ -113,7 +111,7 @@ function createCommandMenuItems() {
 		browser.menus.create(
 			{
 				id: actionId,
-				title: "Run command “" + name + "”",
+				title: browser.i18n.getMessage("pageCommandContextMenu", name),
 				contexts: ["page_action"]
 			});
 
@@ -122,7 +120,7 @@ function createCommandMenuItems() {
 		browser.menus.create(
 			{
 				id: pageId,
-				title: "Run command “" + name + "”",
+				title: browser.i18n.getMessage("pageCommandContextMenu", name),
 				contexts: ["page"]
 			});
 
@@ -131,7 +129,7 @@ function createCommandMenuItems() {
 		browser.menus.create(
 			{
 				id: linkId,
-				title: "Run “" + name + "” on link",
+				title: browser.i18n.getMessage("linkCommandContextMenu", name),
 				contexts: ["link"]
 			});
 	}
@@ -143,7 +141,7 @@ function createCommandMenuItems() {
 browser.menus.create(
 	{
 		id: "run-page-command",
-		title: "Run default shell command",
+		title: browser.i18n.getMessage("pageCommandDefaultContextMenu"),
 		contexts: ["page"]
 	}
 );
@@ -153,7 +151,7 @@ browser.menus.create(
 browser.menus.create(
 	{
 		id: "run-link-command",
-		title: "Run default command on link",
+		title: browser.i18n.getMessage("linkCommandDefaultContextMenu"),
 		contexts: ["link"]
 	}
 );
@@ -168,8 +166,6 @@ browser.pageAction.onClicked.addListener((tab) => {
 // When a context-menu (right-click menu) is opened, only display the SHellfox
 // item if there is a configured command for that page.
 browser.menus.onShown.addListener(info => {
-	console.log(info);
-	console.log(info.modifiers);
 	if (info.contexts.includes("link") && getUrlCommands(info.linkUrl)) {
 		showLinkContextMenuItem();
 	} else if (info.contexts.includes("page") && getUrlCommands(info.pageUrl)) {
diff --git a/manifest.json b/manifest.json
index 877c142..8cfa522 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,11 +1,13 @@
 {
 	"manifest_version": 2,
-	"name": "Shellfox",
+	"name": "__MSG_extensionName__",
 	"version": "0.1",
 
-	"description": "Run command-line programs from Firefox, easily.",
+	"description": "__MSG_extensionDescription__",
 	"homepage_url": "https://hak.xwx.moe/jadedctrl/shellfox",
 
+	"default_locale": "en",
+
 	"icons": {
 		"250": "res/shellfox.png",
 		"38": "res/shellfox-38.png",
@@ -17,7 +19,7 @@
 			"19": "res/shellfox-19.png",
 			"38": "res/shellfox-38.png"
 		},
-		"default_title": "Shellfox"
+		"default_title": "__MSG_pageActionName__"
 	},
 
 	"permissions": [
diff --git a/options.html b/options.html
index d172235..55bc6ce 100644
--- a/options.html
+++ b/options.html
@@ -5,12 +5,12 @@
 	</head>
 	<body>
 		<section>
-			<h3>Shell commands</h3>
-			<p>Add shell commands, to be executed with a page’s URL as its argument. In a command, $URL will be replaced with the target page’s URL.</p>
+			<h3 id="commandTitle">Shell commands</h3>
+			<p id="commandP">Add shell commands, to be executed with a page’s URL as its argument. In a command, $URL will be replaced with the target page’s URL.</p>
 			<table id="commandTable">
 				<tr>
-					<th>Name</th>
-					<th>Shell command</th>
+					<th id="commandNameTh">Name</th>
+					<th id="commandShellTh">Shell command</th>
 				</tr>
 			</table>
 			<button style="width: 5em;" id="save-cmd">Apply</button>
@@ -18,12 +18,12 @@
 
 
 		<section>
-			<h3>URL/Page rules</h3>
-			<p>Associate the above commands with URLs, based on regex rules. When a URL is tied to a command, a button will appear in context-menus and the address bar to run said command.</p>
+			<h3 id="ruleTitle">URL/Page rules</h3>
+			<p id="ruleP">Associate the above commands with URLs, based on regex rules. When a URL is tied to a command, a button will appear in context-menus and the address bar to run said command.</p>
 			<table id="regexTable">
 				<tr>
-					<th>URL regex</th>
-					<th>Shell command</th>
+					<th id="ruleRegexTh">URL regex</th>
+					<th id="ruleShellTh">Shell command</th>
 				</tr>
 			</table>
 			<button style="width: 5em;" id="save-regex">Apply</button>
diff --git a/options.js b/options.js
index 9b4b39d..2518ec5 100644
--- a/options.js
+++ b/options.js
@@ -1,11 +1,9 @@
 // Given the name of an array saved to localStorage, return it (if possible).
 function savedArray(name) {
-	let saved = [];
 	try {
-		saved = JSON.parse(localStorage.getItem(name));
+		let saved = JSON.parse(localStorage.getItem(name));
 		return saved;
-	} catch { };
-	return saved;
+	} catch { return []; };
 }
 
 
@@ -93,7 +91,7 @@ function createRegexTr(regex, command_i, commandMenu) {
 	let regexInput = document.createElement("INPUT");
 	regexInput.setAttribute("class", "regex");
 	regexInput.setAttribute("type", "text");
-	regexInput.setAttribute("placeholder", "https://example.org/.*");
+	regexInput.setAttribute("placeholder", browser.i18n.getMessage("optionsPlaceholderRule"));
 	if (regex && command_i)
 		regexInput.setAttribute("value", regex);
 
@@ -119,7 +117,7 @@ function createCommandTr(name, command) {
 	let nameInput = document.createElement("INPUT");
 	nameInput.setAttribute("class", "name");
 	nameInput.setAttribute("type", "text");
-	nameInput.setAttribute("placeholder", "Curl");
+	nameInput.setAttribute("placeholder", browser.i18n.getMessage("optionsPlaceholderName"));
 	if (name && command)
 		nameInput.setAttribute("value", name);
 
@@ -129,7 +127,7 @@ function createCommandTr(name, command) {
 	let commandInput = document.createElement("INPUT");
 	commandInput.setAttribute("class", "command");
 	commandInput.setAttribute("type", "text");
-	commandInput.setAttribute("placeholder", "curl $URL > /tmp/downloaded");
+	commandInput.setAttribute("placeholder", browser.i18n.getMessage("optionsPlaceholderCommand"));
 	if (name && command)
 		commandInput.setAttribute("value", command);
 
@@ -144,6 +142,25 @@ function createCommandTr(name, command) {
 }
 
 
+// Replace the HTML elements’ text with the extension’s translations.
+function i18nPage() {
+	document.getElementsByTagName("html")[0].setAttribute("lang", browser.i18n.getMessage("@@ui_locale"));
+
+	document.getElementById("commandTitle").innerText = browser.i18n.getMessage("optionsTitleShell");
+	document.getElementById("commandP").innerText = browser.i18n.getMessage("optionsDescShell");
+	document.getElementById("commandNameTh").innerText = browser.i18n.getMessage("optionsHeadShellName");
+	document.getElementById("commandShellTh").innerText = browser.i18n.getMessage("optionsHeadShellCommand");
+
+	document.getElementById("ruleTitle").innerText = browser.i18n.getMessage("optionsTitleRule");
+	document.getElementById("ruleP").innerText = browser.i18n.getMessage("optionsDescRule");
+	document.getElementById("ruleRegexTh").innerText = browser.i18n.getMessage("optionsHeadRuleName");
+	document.getElementById("ruleShellTh").innerText = browser.i18n.getMessage("optionsHeadRuleCommand");
+
+	document.getElementById("save-cmd").innerText = browser.i18n.getMessage("optionsSaveButton");
+	document.getElementById("save-regex").innerText = browser.i18n.getMessage("optionsSaveButton");
+}
+
+
 document.addEventListener("click", e => {
 	if (e.target.id == ("save-cmd")) {
 		saveCommands();
@@ -157,3 +174,4 @@ document.addEventListener("click", e => {
 
 populateCommandTable();
 populateRegexTable();
+i18nPage();