diff --git a/actions.lua b/actions.lua
index b243ce7..9b0568b 100644
--- a/actions.lua
+++ b/actions.lua
@@ -1,6 +1,8 @@
+local S = classroom.S
+
 classroom.register_action("bring", {
-	title = "Bring",
-	description = "Teleport players to your location",
+	title = S"Bring",
+	description = S"Teleport players to your location",
 	online_required = true,
 	func = function(runner, players)
 		local pos = runner:get_pos()
@@ -13,8 +15,8 @@ classroom.register_action("bring", {
 })
 
 classroom.register_action("look", {
-	title = "Look",
-	description = "Make players look at you",
+	title = S"Look",
+	description = S"Make players look at you",
 	online_required = true,
 	func = function(runner, players)
 		local pos = runner:get_pos()
@@ -28,8 +30,8 @@ classroom.register_action("look", {
 })
 
 classroom.register_action("mute", {
-	title = "Mute",
-	description = "Revoke shout from players",
+	title = S"Mute",
+	description = S"Revoke shout from players",
 	online_required = false,
 	func = function(runner, players)
 		for _, name in pairs(players) do
@@ -42,8 +44,8 @@ classroom.register_action("mute", {
 })
 
 classroom.register_action("unmute", {
-	title = "Unmute",
-	description = "Grant shout to players",
+	title = S"Unmute",
+	description = S"Grant shout to players",
 	online_required = false,
 	func = function(runner, players)
 		for _, name in pairs(players) do
@@ -55,8 +57,8 @@ classroom.register_action("unmute", {
 })
 
 classroom.register_action("fly", {
-	title = "Fly",
-	description = "Grant fly to players",
+	title = S"Fly",
+	description = S"Grant fly to players",
 	online_required = false,
 	func = function(runner, players)
 		for _, name in pairs(players) do
@@ -68,8 +70,8 @@ classroom.register_action("fly", {
 })
 
 classroom.register_action("nofly", {
-	title = "NoFly",
-	description = "Revoke fly from players",
+	title = S"NoFly",
+	description = S"Revoke fly from players",
 	online_required = false,
 	func = function(runner, players)
 		for _, name in pairs(players) do
diff --git a/gui.lua b/gui.lua
index b16cfa0..ddf651e 100644
--- a/gui.lua
+++ b/gui.lua
@@ -1,16 +1,18 @@
+local S = classroom.S
+local FS = classroom.FS
 local infos = {
 	{
-		title = "Shout?",
+		title = S"Shout?",
 		type = "priv",
 		privs = { shout = true },
 	},
 	{
-		title = "Fly?",
+		title = S"Fly?",
 		type = "priv",
 		privs = { fly = true },
 	},
 	{
-		title = "Fast?",
+		title = S"Fast?",
 		type = "priv",
 		privs = { fast = true },
 	},
@@ -25,7 +27,7 @@ local function get_group(context)
 end
 
 sfinv.register_page("classroom:edu", {
-	title = "Classroom",
+	title = S"Classroom",
 	check_perm = function(self, player)
 		return minetest.check_player_privs(player:get_player_name(), { teacher = true })
 	end,
@@ -34,7 +36,7 @@ sfinv.register_page("classroom:edu", {
 	end,
 	get = function(self, player, context)
 		if not self:check_perm(player) then
-			return "label[0,0;Access denied]"
+			return "label[0,0;" .. FS"Access denied" .. "]"
 		end
 
 		local fs = {
@@ -52,7 +54,8 @@ sfinv.register_page("classroom:edu", {
 
 		fs[#fs + 1] = "]"
 		do
-			fs[#fs + 1] = "tabheader[0.3,1.1;group;All"
+			fs[#fs + 1] = "tabheader[0.3,1.1;group;"
+			fs[#fs + 1] = FS"All"
 			local selected_group_idx = 1
 			local i = 2
 			for name, group in pairs(classroom.get_all_groups()) do
@@ -88,7 +91,7 @@ sfinv.register_page("classroom:edu", {
 				if col.type == "priv" then
 					local has_priv = minetest.check_player_privs(student, col.privs)
 					color = has_priv and "green" or "red"
-					value = has_priv and "Yes" or "No"
+					value = has_priv and FS"Yes" or FS"No"
 				end
 
 				fs[#fs + 1] = ","
@@ -102,46 +105,78 @@ sfinv.register_page("classroom:edu", {
 		fs[#fs + 1] = selection_id
 		fs[#fs + 1] = "]"
 
-		fs[#fs + 1] = "button[5.25,-0.2;1.4,1;new_group;New Group]"
+		fs[#fs + 1] = "button[5.25,-0.2;1.4,1;new_group;"
+		fs[#fs + 1] = FS"New Group"
+		fs[#fs + 1] = "]"
 		if context.groupname then
-			fs[#fs + 1] = "button[6.65,-0.2;1.4,1;edit_group;Edit Group]"
+			fs[#fs + 1] = "button[6.65,-0.2;1.4,1;edit_group;"
+			fs[#fs + 1] = FS"Edit Group"
+			fs[#fs + 1] = "]"
 		else
 			fs[#fs + 1] = "box[6.65,-0.1;1.2,0.7;#222]"
-			fs[#fs + 1] = "label[6.8,0.05;Edit Group]"
-			fs[#fs + 1] = "tooltip[6.65,-0.2;1.4,1;Please select a group first]"
+			fs[#fs + 1] = "label[6.8,0.05;"
+			fs[#fs + 1] = FS"Edit Group"
+			fs[#fs + 1] = "]"
+			fs[#fs + 1] = "tooltip[6.65,-0.2;1.4,1;"
+			fs[#fs + 1] = FS"Please select a group first"
+			fs[#fs + 1] = "]"
 		end
 
 		fs[#fs + 1] = "container[5.25,1.1]"
 		fs[#fs + 1] = "box[-0.25,-0.3;3.1,1.15;#666]"
-		fs[#fs + 1] = "label[0,-0.3;Run actions on:]"
+		fs[#fs + 1] = "label[0,-0.3;"
+		fs[#fs + 1] = FS"Run actions on:"
+		fs[#fs + 1] = "]"
 		if context.select_toggle == "all" then
 			fs[#fs + 1] = "box[0,0.1;0.8,0.7;#53ac56]"
-			fs[#fs + 1] = "label[0.3,0.25;All]"
+			fs[#fs + 1] = "label[0.3,0.25;"
+			fs[#fs + 1] = FS"All"
+			fs[#fs + 1] = "]"
 		else
-			fs[#fs + 1] = "button[0,0;1,1;select_all;All]"
+			fs[#fs + 1] = "button[0,0;1,1;select_all;"
+			fs[#fs + 1] = FS"All"
+			fs[#fs + 1] = "]"
 		end
 		if not context.groupname then
 			fs[#fs + 1] = "box[0.9,0.1;0.8,0.7;#333]"
-			fs[#fs + 1] = "label[1.05,0.25;Group]"
-			fs[#fs + 1] = "tooltip[0.9,0;1,1;Please select a group first]"
+			fs[#fs + 1] = "label[1.05,0.25;"
+			fs[#fs + 1] = FS"Group"
+			fs[#fs + 1] = "]"
+			fs[#fs + 1] = "tooltip[0.9,0;1,1;"
+			fs[#fs + 1] = FS"Please select a group first"
+			fs[#fs + 1] = "]"
 		elseif context.select_toggle == "group" then
 			fs[#fs + 1] = "box[0.9,0.1;0.8,0.7;#53ac56]"
-			fs[#fs + 1] = "label[1.05,0.25;Group]"
+			fs[#fs + 1] = "label[1.05,0.25;"
+			fs[#fs + 1] = FS"Group"
+			fs[#fs + 1] = "]"
 		else
-			fs[#fs + 1] = "button[0.9,0;1,1;select_group;Group]"
+			fs[#fs + 1] = "button[0.9,0;1,1;select_group;"
+			fs[#fs + 1] = FS"Group"
+			fs[#fs + 1] = "]"
 		end
 		if not context.selected_student then
 			fs[#fs + 1] = "box[1.8,0.1;0.8,0.7;#333]"
-			fs[#fs + 1] = "label[1.85,0.25;Selected]"
-			fs[#fs + 1] = "tooltip[1.8,0;1,1;Please select a student first]"
+			fs[#fs + 1] = "label[1.85,0.25;"
+			fs[#fs + 1] = FS"Selected"
+			fs[#fs + 1] = "]"
+			fs[#fs + 1] = "tooltip[1.8,0;1,1;"
+			fs[#fs + 1] = FS"Please select a student first"
+			fs[#fs + 1] = "]"
 		elseif context.select_toggle == "selected" then
 			fs[#fs + 1] = "box[1.8,0.1;0.8,0.7;#53ac56]"
-			fs[#fs + 1] = "label[1.85,0.25;Selected]"
+			fs[#fs + 1] = "label[1.85,0.25;"
+			fs[#fs + 1] = FS"Selected"
+			fs[#fs + 1] = "]"
 		else
-			fs[#fs + 1] = "button[1.8,0;1,1;select_selected;Selected]"
+			fs[#fs + 1] = "button[1.8,0;1,1;select_selected;"
+			fs[#fs + 1] = FS"Selected"
+			fs[#fs + 1] = "]"
 		end
 
-		fs[#fs + 1] = "label[0,0.9;Actions]"
+		fs[#fs + 1] = "label[0,0.9;"
+		fs[#fs + 1] = FS"Actions:"
+		fs[#fs + 1] = "]"
 
 		local x = 0
 		local y = 1.2
@@ -177,10 +212,12 @@ sfinv.register_page("classroom:edu", {
 			fs[#fs + 1] = tostring(y)
 			fs[#fs + 1] = "]"
 
-			fs[#fs + 1] = "label[0,-0.1;Selected user: "
-			fs[#fs + 1] = minetest.formspec_escape(context.selected_student)
+			fs[#fs + 1] = "label[0,-0.1;"
+			fs[#fs + 1] = FS("Selected user: @1", context.selected_student)
+			fs[#fs + 1] = "]"
+			fs[#fs + 1] = "button[0,0.3;1.5,1;teleport;"
+			fs[#fs + 1] = FS"Teleport to"
 			fs[#fs + 1] = "]"
-			fs[#fs + 1] = "button[0,0.3;1.5,1;teleport;Teleport To]"
 
 			fs[#fs + 1] = "container_end[]"
 		end
@@ -303,11 +340,11 @@ function classroom.show_new_group(player)
 		return
 	end
 
-	minetest.show_formspec(player:get_player_name(), "classroom:new_group", [[
-		size[5,1.8]
-		field[0.2,0.4;5,1;name;Name;]
-		button[1.5,1;2,1;create;Create]
-	]])
+	minetest.show_formspec(player:get_player_name(), "classroom:new_group", table.concat({
+		"size[5,1.8]",
+		"field[0.2,0.4;5,1;name;", FS"Name", ";]",
+		"button[1.5,1;2,1;create;", FS"Create", "]",
+	}, ""))
 end
 
 
@@ -344,8 +381,10 @@ function classroom.show_edit_group(player, groupname)
 
 	local fs = {
 		"size[5.55,6]",
-		"label[0,-0.1;Other students]",
-		"label[3.3,-0.1;Students in group ", minetest.formspec_escape(context.groupname), "]",
+		"label[0,-0.1;", FS"Other students", "]",
+		"label[3.3,-0.1;",
+		FS("Students in group @1", context.groupname),
+		"]",
 		"button[2.25,0.5;1,1;go_right;", minetest.formspec_escape(">"), "]",
 		"button[2.25,1.5;1,1;go_left;", minetest.formspec_escape("<"), "]",
 	}
@@ -367,7 +406,9 @@ function classroom.show_edit_group(player, groupname)
 		fs[#fs + 1] = tostring(context.index_r)
 		fs[#fs + 1] = "]"
 	else
-		fs[#fs + 1] = "label[3.5,0.7;No students]"
+		fs[#fs + 1] = "label[3.5,0.7;"
+		fs[#fs + 1] = FS("No students")
+		fs[#fs + 1] = "]"
 	end
 
 	local not_members = classroom.get_students_except(members)
@@ -389,7 +430,9 @@ function classroom.show_edit_group(player, groupname)
 		fs[#fs + 1] = tostring(context.index_l)
 		fs[#fs + 1] = "]"
 	else
-		fs[#fs + 1] = "label[0.4,0.7;No students]"
+		fs[#fs + 1] = "label[0.4,0.7;"
+		fs[#fs + 1] = FS("No students")
+		fs[#fs + 1] = "]"
 	end
 
 	minetest.show_formspec(player:get_player_name(), "classroom:edit_group", table.concat(fs, ""))
diff --git a/init.lua b/init.lua
index 408e464..88d4c0e 100644
--- a/init.lua
+++ b/init.lua
@@ -1,5 +1,10 @@
 classroom = {}
 
+classroom.S = minetest.get_translator("classroom")
+classroom.FS = function(...)
+	return minetest.formspec_escape(classroom.S(...))
+end
+
 dofile(minetest.get_modpath("classroom") .. "/api.lua")
 dofile(minetest.get_modpath("classroom") .. "/gui.lua")
 dofile(minetest.get_modpath("classroom") .. "/actions.lua")
@@ -8,6 +13,7 @@ minetest.register_privilege("teacher", {
 	give_to_singleplayer = false
 })
 
+-- Hooks needed to make api.lua testable
 classroom.get_connected_players = minetest.get_connected_players
 classroom.get_player_by_name = minetest.get_player_by_name
 classroom.check_player_privs = minetest.check_player_privs
diff --git a/tests/api_spec.lua b/tests/api_spec.lua
index e11c3b1..2f1b6d0 100644
--- a/tests/api_spec.lua
+++ b/tests/api_spec.lua
@@ -8,6 +8,7 @@ end
 
 local function recreate_classroom()
 	_G.classroom = {
+		S = string.format,
 		get_connected_players = function()
 			return {
 				fake_player("user1"),
diff --git a/utils/client.conf b/utils/client.conf
new file mode 100644
index 0000000..58c7654
--- /dev/null
+++ b/utils/client.conf
@@ -0,0 +1,4 @@
+max_fps = 5
+screen_h = 30
+screen_w = 30
+enable_shaders = false
diff --git a/utils/server.conf b/utils/server.conf
new file mode 100644
index 0000000..f5c262a
--- /dev/null
+++ b/utils/server.conf
@@ -0,0 +1,2 @@
+name = teacher1
+port = 30000
diff --git a/utils/start.sh b/utils/start.sh
index 010b82a..81f233e 100755
--- a/utils/start.sh
+++ b/utils/start.sh
@@ -10,9 +10,17 @@ find_minetest() {
 	echo "Found minetest at: $MT_DIR"
 }
 
+set_conf() {
+	# Make readonly config
+	conf=/tmp/$1.conf
+	chmod 0644 $conf # incase it already exists
+	cp utils/$1.conf /tmp/$1.conf
+	chmod 0444 $conf
+}
+
 start_server() {
 	echo "Starting server"
-	$MT --server --port 30000 --world "${MT_DIR}/worlds/edu" --name "teacher1" &
+	$MT --server --port 30000 --world "${MT_DIR}/worlds/edu" --name "teacher1" --config "$conf" &
 }
 
 start_client() {
@@ -22,15 +30,16 @@ start_client() {
 
 start_headless_client() {
 	echo "Starting headless client $1"
-	xvfb-run $MT --address "127.0.0.1" --name $1 --password "pass" --go &
+	xvfb-run $MT --address "127.0.0.1" --name $1 --password "pass" --config "$conf" --go &
 }
 
 
 find_minetest
-build_conf
 
+set_conf server
 start_server
 
+set_conf client
 start_headless_client student1
 start_headless_client student2
 start_headless_client student3