diff --git a/builtin/fstk/ui.lua b/builtin/fstk/ui.lua
index 3ac0386..a3e3a09 100644
--- a/builtin/fstk/ui.lua
+++ b/builtin/fstk/ui.lua
@@ -92,9 +92,9 @@ function ui.update()
 		formspec = wordwrap_quickhack(gamedata.errormessage)
 		local error_title
 		if string.find(gamedata.errormessage, "ModError") then
-			error_title = fgettext("An error occured in a Lua script, such as a mod:")
+			error_title = fgettext("An error occurred in a Lua script, such as a mod:")
 		else
-			error_title = fgettext("An error occured:")
+			error_title = fgettext("An error occurred:")
 		end
 		formspec = "size[12,5]" ..
 				"label[0.5,0;" .. error_title ..
diff --git a/builtin/mainmenu/dlg_config_world.lua b/builtin/mainmenu/dlg_config_world.lua
index 3e766aa..daa8099 100644
--- a/builtin/mainmenu/dlg_config_world.lua
+++ b/builtin/mainmenu/dlg_config_world.lua
@@ -142,7 +142,7 @@ local function handle_buttons(this, fields)
 				elseif mod.enabled then
 					gamedata.errormessage = fgettext_ne("Failed to enable mo" ..
 							"d \"$1\" as it contains disallowed characters. " ..
-							"Only chararacters [a-z0-9_] are allowed.",
+							"Only characters [a-z0-9_] are allowed.",
 							mod.name)
 				end
 				mods["load_mod_" .. mod.name] = nil