diff --git a/i4/locale/template.txt b/i4/locale/template.txt
index f4accae..a6ba599 100644
--- a/i4/locale/template.txt
+++ b/i4/locale/template.txt
@@ -14,10 +14,16 @@ Items=
 There is already a bag=
 This is not a bag=
 @1 (@2% full)=
+Small Backpack=
+Medium Backpack=
+Large Backpack=
 Teleported to: @1=
+Waypoints limit reached (@1)=
 You already have set a waypoint at this position=
 Welcome back home!=
+'home' privilege missing=
 Your Minetest client needs updating (www.minetest.net)=
+No home set=
 Any dye=
 Any coal=
 Any sand=
@@ -82,7 +88,6 @@ No=
 Home=
 Style=
 Sorting=
-No home set=
 Set home=
 Hide tabs=
 HUD description=
@@ -133,3 +138,6 @@ Collect items to reveal more recipes=
 Click to hide=
 Click to expand=
 Bookmarks=
+Unlocked=
+New recipe unlocked!=
+@1 new recipes unlocked!=
diff --git a/i4/src/bags.lua b/i4/src/bags.lua
index 7650069..2096b7f 100644
--- a/i4/src/bags.lua
+++ b/i4/src/bags.lua
@@ -156,11 +156,15 @@ local bag_recipes = {
 	},
 }
 
+-- For detection by update_translations script.
+--	S('Small Backpack')
+--	S('Medium Backpack')
+--	S('Large Backpack')
 for size, item in pairs(bag_recipes) do
 	local bagname = fmt("i4:bag_%s", size)
 
 	core.register_craftitem(bagname, {
-		description = fmt("%s Backpack", size:gsub("^%l", string.upper)),
+		description = S(fmt("%s Backpack", size:gsub("^%l", string.upper))),
 		inventory_image = fmt("i3_bag_%s.png", size),
 		groups = {bag = item.size},
 		stack_max = 1,
diff --git a/i4/src/fields.lua b/i4/src/fields.lua
index 73ff548..e00b3f1 100644
--- a/i4/src/fields.lua
+++ b/i4/src/fields.lua
@@ -138,7 +138,7 @@ local function inv_fields(player, data, fields)
 
 		if #data.waypoints >= max_waypoints then
 			play_sound(name, "i3_cannot", 0.8)
-			return msg(name, fmt("Waypoints limit reached (%u)", max_waypoints))
+			return msg(name, S("Waypoints limit reached (@1)", max_waypoints))
 		end
 
 		local pos = player:get_pos()
@@ -392,13 +392,13 @@ local function home_footer_fields(player, data, fields)
 	-- Use minetest_game’s sethome API, if available.
 	if sethome then
 		if not sethome.go(name) then
-			msg(name, "No home set")
+			msg(name, S("No home set"))
 		else
 			msg(name, S("Welcome back home!"))
 		end
 	-- Otherwise, use i4’s home.
 	elseif not data.home then
-		msg(name, "No home set")
+		msg(name, S("No home set"))
 	elseif name then
 		safe_teleport(player, str_to_pos(data.home))
 		msg(name, S("Welcome back home!"))
@@ -424,7 +424,7 @@ end
 local function settings_footer_fields(player, data, fields)
 	local name = player:get_player_name()
 	if fields.set_home and not check_privs(name, {home = true}) then
-		return msg(name, "'home' privilege missing")
+		return msg(name, S("'home' privilege missing"))
 	elseif fields.set_home then
 		if sethome then
 			sethome.set(name, player:get_pos())
diff --git a/i4/src/progressive.lua b/i4/src/progressive.lua
index b66b921..007b5c7 100644
--- a/i4/src/progressive.lua
+++ b/i4/src/progressive.lua
@@ -2,14 +2,14 @@ local set_fs = i4.set_fs
 local hud_notif = i4.hud_notif
 local POLL_FREQ = 0.25
 
-IMPORT("reg_items", "reg_nodes", "fmt", "table_merge", "array_diff")
+IMPORT("reg_items", "reg_nodes", "fmt", "S", "table_merge", "array_diff")
 IMPORT("is_group", "extract_groups", "item_has_groups", "apply_recipe_filters", "sort_by_category")
 
 i4.remove_minitab"nodes"
 i4.remove_minitab"items"
 
 i4.new_minitab("unlocked", {
-	description = "Unlocked",
+	description = S("Unlocked"),
 
 	sorter = function(item, data)
 		return data.items_progress[item]
@@ -142,7 +142,10 @@ local function poll_new_items(player, data, join)
 		data.discovered = data.known_recipes - oldknown
 
 		if data.discovered > 0 then
-			local msg = fmt("%u new recipe%s unlocked!", data.discovered, data.discovered > 1 and "s" or "")
+			local msg = S("New recipe unlocked!")
+			if data.discovered > 1 then
+				msg = S("@1 new recipes unlocked!", data.discovered)
+			end
 			local last_discovered = diff[1]
 			local img = reg_items[last_discovered].inventory_image