diff --git a/idioma.lua b/idioma.lua
index c0fe99e..6899f5e 100644
--- a/idioma.lua
+++ b/idioma.lua
@@ -41,7 +41,7 @@ end
 -- Acessar menu de seleção de idiomas
 local acessar_menu_idiomas = function(player)
 	local name = player:get_player_name()
-	local lang = getlang(name)
+	local lang = getlang(name) or "en" -- não pode ser nulo
 	
 	-- Idioma selecionado
 	local idioma_sel = "1"
diff --git a/lib/mylang.lua b/lib/mylang.lua
index 0c2be06..7d97d17 100644
--- a/lib/mylang.lua
+++ b/lib/mylang.lua
@@ -276,17 +276,17 @@ bd.listar = function(tb)
 end
 
 -- Fim
-local respostas = {
+local idiomas = {
 	["en"] = "English language defined.",
 	["pt"] = "Idioma portugues definido.",
 	["de"] = "Deutsch Sprache gesetzt.",
 	["es"] = "Idioma espanol definido.",
 }
 local resposta = function(lang)
-	if not respostas[lang] then
+	if not idiomas[lang] then
 		return lang.." language code defined"
 	else
-		return respostas[lang]
+		return idiomas[lang]
 	end
 end
 
@@ -310,6 +310,11 @@ minetest.register_chatcommand("mylang", {
 		end
 		local lang = string.lower(param)
 		
+		-- Verifica se o idioma é aceitavel
+		if not idiomas[lang] then
+			return false, "Invalid language code (choose one of these \"en\", \"pt\", \"de\" or \"es\")"
+		end
+		
 		-- Salvar escolha
 		definir_idioma(name, lang)
 		
@@ -321,7 +326,7 @@ minetest.register_chatcommand("mylang", {
 -- Pegar idioma salvo
 local pegar_idioma = function(name)
 	if bd.verif("langs", name) ~= true then
-		return "en"
+		return nil
 	end
 	return bd.pegar("langs", name)
 end
diff --git a/xgettext.sh b/xgettext.sh
deleted file mode 100755
index 6aebe58..0000000
--- a/xgettext.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#! /bin/bash
-
-me=$(basename "${BASH_SOURCE[0]}");
-
-if [[ $# -lt 1 ]]; then
-	echo "Usage: $me FILE..." >&2;
-	exit 1;
-fi
-
-mkdir -p locale;
-echo "Generating template..." >&2;
-xgettext --from-code=UTF-8 \
-		--keyword=S \
-		--keyword=SS:2 \
-		--keyword=NS:1,2 \
-		--keyword=SNS:2,3 \
-		--keyword=N_ \
-		--add-comments='Translators:' \
-		--add-location=file \
-		-o locale/template.pot \
-		"$@" \
-		|| exit;
-
-find locale -name '*.po' -type f | while read -r file; do
-	echo "Updating $file..." >&2;
-	msgmerge --update "$file" locale/template.pot;
-done
-
-echo "DONE!" >&2;