diff --git a/init.lua b/init.lua
index 43ffd1b..da280bb 100644
--- a/init.lua
+++ b/init.lua
@@ -30,6 +30,10 @@ if minetest.get_modpath("default") then
 	mail.theme = default.gui_bg .. default.gui_bg_img
 end
 
+-- translation
+S = minetest.get_translator("mail")
+
+-- sub files
 local MP = minetest.get_modpath(minetest.get_current_modname())
 dofile(MP .. "/util/normalize.lua")
 dofile(MP .. "/util/uuid.lua")
diff --git a/locale/mail.fr.tr b/locale/mail.fr.tr
new file mode 100644
index 0000000..1896a00
--- /dev/null
+++ b/locale/mail.fr.tr
@@ -0,0 +1,46 @@
+# textdomain: mail
+BCC=Cci
+Cancel=Annuler
+Send=Envoyer
+Player name=Nom du joueur
+your contacts.=vos contacts.
+The contact=Ce contact
+Save=Sauvegarder
+That name=Ce nom
+is already in=existe déjà
+name cannot=nom ne peut pas
+be empty.=être vide.
+Note=Note
+Maillist name=Nom de la liste de diffusion
+Desc=Desc
+Players=Joueurs
+your maillists.=vos listes de diffusion.
+The maillist=Cette liste de diffusion
+Back=Retour
+Mark Read=Marquer comme lu
+Mark Unread=Marquer non lu
+Delete=Supprimer
+New=Nouveau
+From=De
+Inbox=Boîte de réception
+Sent messages=Messages envoyés
+Read=Lire
+Contacts=Contacts
+Mail lists=Listes de diffusion
+About=À propos
+Close=Fermer
+(No subject)=(Sans objet)
+No mail=Aucun mail
+Reply=Répondre
+Reply all=Répondre à tous
+Forward=Transférer
+Subject=Objet
+(No description)=Sans description
+No maillist=Aucune liste de diffusion
+Edit=Modifier
+Name=Nom
+Date=Date
+Add=Ajouter
+Remove=Enlever
+CC=Cc
+To=À
diff --git a/locale/mail.fr.tr.old b/locale/mail.fr.tr.old
new file mode 100644
index 0000000..6d445c3
--- /dev/null
+++ b/locale/mail.fr.tr.old
@@ -0,0 +1,44 @@
+# textdomain: mail
+BCC=Cci
+Cancel=Annuler
+Send=Envoyer
+Note=Note
+Back=Retour
+Delete=Supprimer
+Edit=Modifier
+Name=Nom
+Player name=Nom du joueur
+your contacts.=vos contacts.
+The contact=Ce contact
+Maillist name=Nom de la liste de diffusion
+Desc=Desc
+Players=Joueurs
+your maillists.=vos listes de diffusion.
+The maillist=Cette liste de diffusion
+Save=Sauvegarder
+That name=Ce nom
+is already in=existe déjà
+name cannot=nom ne peut pas
+be empty.=être vide.
+Mark Read=Marquer comme lu
+Mark Unread=Marquer non lu
+New=Nouveau
+From=De
+Reply=Répondre
+Reply all=Répondre à tous
+Forward=Transférer
+Subject=Objet
+Inbox=Boîte de réception
+Sent messages=Messages envoyés
+Read=Lire
+Contacts=Contacts
+Mail lists=Listes de diffusion
+About=À propos
+Close=Fermer
+(No subject)=(Sans objet)
+No mail=Aucun mail
+(No description)=Sans description
+No maillist=Aucune liste de diffusion
+Date=Date
+CC=Cc
+To=À
diff --git a/locale/template.txt b/locale/template.txt
new file mode 100644
index 0000000..47e50fb
--- /dev/null
+++ b/locale/template.txt
@@ -0,0 +1,46 @@
+# textdomain: mail
+BCC=
+Cancel=
+Send=
+Player name=
+your contacts.=
+The contact=
+Save=
+That name=
+is already in=
+name cannot=
+be empty.=
+Note=
+Maillist name=
+Desc=
+Players=
+your maillists.=
+The maillist=
+Back=
+Mark Read=
+Mark Unread=
+Delete=
+New=
+From=
+Inbox=
+Sent messages=
+Read=
+Contacts=
+Mail lists=
+About=
+Close=
+(No subject)=
+No mail=
+Reply=
+Reply all=
+Forward=
+Subject=
+(No description)=
+No maillist=
+Edit=
+Name=
+Date=
+Add=
+Remove=
+CC=
+To=
diff --git a/ui/compose.lua b/ui/compose.lua
index ad7f653..d80d8aa 100644
--- a/ui/compose.lua
+++ b/ui/compose.lua
@@ -3,16 +3,16 @@ local FORMNAME = "mail:compose"
 function mail.show_compose(name, to, subject, body, cc, bcc)
 	local formspec = [[
 			size[8,9]
-			button[0,0;1,1;tocontacts;To:]
+			button[0,0;1,1;tocontacts;]] .. S("To") .. [[:]
 			field[1.1,0.3;3.2,1;to;;%s]
-			button[4,0;1,1;cccontacts;CC:]
+			button[4,0;1,1;cccontacts;]] .. S("CC") .. [[:]
 			field[5.1,0.3;3.1,1;cc;;%s]
-			button[4,0.75;1,1;bcccontacts;BCC:]
+			button[4,0.75;1,1;bcccontacts;]] .. S("BCC") .. [[:]
 			field[5.1,1.05;3.1,1;bcc;;%s]
-			field[0.25,2;8,1;subject;Subject:;%s]
+			field[0.25,2;8,1;subject;]] .. S("Subject") .. [[:;%s]
 			textarea[0.25,2.5;8,6;body;;%s]
-			button[0.5,8.5;3,1;cancel;Cancel]
-			button[4.5,8.5;3,1;send;Send]
+			button[0.5,8.5;3,1;cancel;]] .. S("Cancel") .. [[]
+			button[4.5,8.5;3,1;send;]] .. S("Send") .. [[]
 		]] .. mail.theme
 
 	formspec = string.format(formspec,
@@ -86,4 +86,4 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
     end
 
     return true
-end)
\ No newline at end of file
+end)
diff --git a/ui/contacts.lua b/ui/contacts.lua
index 1ea642a..b900186 100644
--- a/ui/contacts.lua
+++ b/ui/contacts.lua
@@ -1,12 +1,12 @@
 local FORMNAME = "mail:contacts"
 
 local contacts_formspec = "size[8,9;]" .. mail.theme .. [[
-		button[6,0.10;2,0.5;new;New]
-		button[6,0.85;2,0.5;edit;Edit]
-		button[6,1.60;2,0.5;delete;Delete]
-		button[6,8.25;2,0.5;back;Back]
+		button[6,0.10;2,0.5;new;]] .. S("New") .. [[]
+		button[6,0.85;2,0.5;edit;]] .. S("Edit") .. [[]
+		button[6,1.60;2,0.5;delete;]] .. S("Delete") .. [[]
+		button[6,8.25;2,0.5;back;]] .. S("Back") .. [[]
 		tablecolumns[color;text;text]
-		table[0,0;5.75,9;contacts;#999,Name,Note]]
+		table[0,0;5.75,9;contacts;#999,]] .. S("Name") .. "," .. S("Note")
 
 
 function mail.show_contacts(name)
@@ -80,4 +80,4 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 
 	return true
-end)
\ No newline at end of file
+end)
diff --git a/ui/edit_contact.lua b/ui/edit_contact.lua
index 15aa50a..a2b8038 100644
--- a/ui/edit_contact.lua
+++ b/ui/edit_contact.lua
@@ -3,22 +3,22 @@ local FORMNAME = "mail:editcontact"
 function mail.show_edit_contact(name, contact_name, note, illegal_name_hint)
 	local formspec = [[
 			size[6,7]
-			button[4,6.25;2,0.5;back;Back]
-			field[0.25,0.5;4,1;name;Player name:;%s]
-			textarea[0.25,1.6;4,6.25;note;Note:;%s]
-			button[4,0.10;2,1;save;Save]
+			button[4,6.25;2,0.5;back;]] .. S("Back") .. [[]
+			field[0.25,0.5;4,1;name;]] .. S("Player name") .. [[:;%s]
+			textarea[0.25,1.6;4,6.25;note;]] .. S("Note") .. [[:;%s]
+			button[4,0.10;2,1;save;]] .. S("Save") .. [[]
 		]]
 	if illegal_name_hint == "collision" then
 		formspec = formspec .. [[
-				label[4,1;That name]
-				label[4,1.5;is already in]
-				label[4,2;your contacts.]
+				label[4,1;]] .. S("That name") .. [[]
+				label[4,1.5;]] .. S("is already in") .. [[]
+				label[4,2;]] .. S("your contacts.") .. [[]
 			]]
 	elseif illegal_name_hint == "empty" then
 		formspec = formspec .. [[
-				label[4,1;The contact]
-				label[4,1.5;name cannot]
-				label[4,2;be empty.]
+				label[4,1;]] .. S("The contact") .. [[]
+				label[4,1.5;]] .. S("name cannot") .. [[]
+				label[4,2;]] .. S("be empty.") .. [[]
 			]]
 	end
 	formspec = formspec .. mail.theme
@@ -71,4 +71,4 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 
 	return true
-end)
\ No newline at end of file
+end)
diff --git a/ui/edit_maillists.lua b/ui/edit_maillists.lua
index 64f7c9c..5495aa5 100644
--- a/ui/edit_maillists.lua
+++ b/ui/edit_maillists.lua
@@ -3,23 +3,23 @@ local FORMNAME = "mail:editmaillist"
 function mail.show_edit_maillist(playername, maillist_name, desc, players, illegal_name_hint)
 	local formspec = [[
 			size[6,7]
-			button[4,6.25;2,0.5;back;Back]
-			field[0.25,0.5;4,1;name;Maillist name:;%s]
-			textarea[0.25,1.6;4,2;desc;Desc:;%s]
-			textarea[0.25,3.6;4,4.25;players;Players:;%s]
-			button[4,0.10;2,1;save;Save]
+			button[4,6.25;2,0.5;back;]] .. S("Back") .. [[]
+			field[0.25,0.5;4,1;name;]] .. S("Maillist name") .. [[:;%s]
+			textarea[0.25,1.6;4,2;desc;]] .. S("Desc") .. [[:;%s]
+			textarea[0.25,3.6;4,4.25;players;]] .. S("Players") .. [[:;%s]
+			button[4,0.10;2,1;save;]] .. S("Save") .. [[]
 		]]
 	if illegal_name_hint == "collision" then
 		formspec = formspec .. [[
-				label[4,1;That name]
-				label[4,1.5;is already in]
-				label[4,2;your maillists.]
+				label[4,1;]] .. S("That name") .. [[]
+				label[4,1.5;]] .. S("is already in") .. [[]
+				label[4,2;]] .. S("your maillists.") .. [[]
 			]]
 	elseif illegal_name_hint == "empty" then
 		formspec = formspec .. [[
-				label[4,1;The maillist]
-				label[4,1.5;name cannot]
-				label[4,2;be empty.]
+				label[4,1;]] .. S("The maillist") .. [[]
+				label[4,1.5;]] .. S("name cannot") .. [[]
+				label[4,2;]] .. S("be empty.") .. [[]
 			]]
 	end
 	formspec = formspec .. mail.theme
@@ -50,4 +50,4 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 
 	return true
-end)
\ No newline at end of file
+end)
diff --git a/ui/inbox.lua b/ui/inbox.lua
index 5851003..fcb78b9 100644
--- a/ui/inbox.lua
+++ b/ui/inbox.lua
@@ -1,21 +1,21 @@
-local inbox_formspec = "size[8,10;]" .. mail.theme .. [[
-    tabheader[0.3,1;boxtab;Inbox,Sent messages;1;false;false]
+local inbox_formspec = "size[8.5,10;]" .. mail.theme .. [[
+    tabheader[0.3,1;boxtab;]] .. S("Inbox") .. "," .. S("Sent messages") .. [[;1;false;false]
 
-    button[6,0.10;2,0.5;new;New]
-    button[6,0.95;2,0.5;read;Read]
-    button[6,1.70;2,0.5;reply;Reply]
-    button[6,2.45;2,0.5;replyall;Reply All]
-    button[6,3.20;2,0.5;forward;Forward]
-    button[6,3.95;2,0.5;delete;Delete]
-    button[6,4.82;2,0.5;markread;Mark Read]
-    button[6,5.55;2,0.5;markunread;Mark Unread]
-    button[6,6.8;2,0.5;contacts;Contacts]
-    button[6,7.6;2,0.5;maillists;Mail lists]
-    button[6,8.7;2,0.5;about;About]
-    button_exit[6,9.5;2,0.5;quit;Close]
+    button[6,0.10;2.5,0.5;new;]] .. S("New") .. [[]
+    button[6,0.95;2.5,0.5;read;]] .. S("Read") .. [[]
+    button[6,1.70;2.5,0.5;reply;]] .. S("Reply") .. [[]
+    button[6,2.45;2.5,0.5;replyall;]] .. S("Reply all") .. [[]
+    button[6,3.20;2.5,0.5;forward;]] .. S("Forward") .. [[]
+    button[6,3.95;2.5,0.5;delete;]] .. S("Delete") .. [[]
+    button[6,4.82;2.5,0.5;markread;]] .. S("Mark Read") .. [[]
+    button[6,5.55;2.5,0.5;markunread;]] .. S("Mark Unread") .. [[]
+    button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+    button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+    button[6,8.7;2.5,0.5;about;]] .. S("About") .. [[]
+    button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
     tablecolumns[color;text;text]
-    table[0,0.7;5.75,9.35;inbox;#999,From,Subject]]
+    table[0,0.7;5.75,9.35;inbox;#999,]] .. S("From") .. "," .. S("Subject")
 
 
 function mail.show_inbox(name)
@@ -51,7 +51,7 @@ function mail.show_inbox(name)
                     formspec[#formspec + 1] = minetest.formspec_escape(message.subject)
                 end
             else
-                formspec[#formspec + 1] = "(No subject)"
+                formspec[#formspec + 1] = S("(No subject)")
             end
         end
         if mail.selected_idxs.inbox[name] then
@@ -60,7 +60,7 @@ function mail.show_inbox(name)
         end
         formspec[#formspec + 1] = "]"
     else
-        formspec[#formspec + 1] = "]label[2.25,4.5;No mail]"
+        formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No mail") .. "]"
     end
     minetest.show_formspec(name, "mail:inbox", table.concat(formspec, ""))
 end
diff --git a/ui/maillists.lua b/ui/maillists.lua
index 5a82b86..36bcc94 100644
--- a/ui/maillists.lua
+++ b/ui/maillists.lua
@@ -1,12 +1,12 @@
 local FORMNAME = "mail:maillists"
 
 local maillists_formspec = "size[8,9;]" .. mail.theme .. [[
-		button[6,0.10;2,0.5;new;New]
-		button[6,0.85;2,0.5;edit;Edit]
-		button[6,1.60;2,0.5;delete;Delete]
-		button[6,8.25;2,0.5;back;Back]
+		button[6,0.10;2,0.5;new;]] .. S("New") .. [[]
+		button[6,0.85;2,0.5;edit;]] .. S("Edit") .. [[]
+		button[6,1.60;2,0.5;delete;]] .. S("Delete") .. [[]
+		button[6,8.25;2,0.5;back;]] .. S("Back") .. [[]
 		tablecolumns[color;text;text]
-		table[0,0;5.75,9;maillists;#999,Name,Description]]
+		table[0,0;5.75,9;maillists;#999,]] .. S("Name") .. "," .. S("Note")
 
 function mail.show_maillists(name)
 	local formspec = { maillists_formspec }
@@ -26,7 +26,7 @@ function mail.show_maillists(name)
 					formspec[#formspec + 1] = minetest.formspec_escape(maillist.desc)
 				end
 			else
-				formspec[#formspec + 1] = "(No description)"
+				formspec[#formspec + 1] = S("(No description)")
 			end
 		end
 		if mail.selected_idxs.maillists[name] then
@@ -35,7 +35,7 @@ function mail.show_maillists(name)
 		end
 		formspec[#formspec + 1] = "]"
 	else
-		formspec[#formspec + 1] = "]label[2.25,4.5;No maillist]"
+		formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No maillist") .. "]"
 	end
 	minetest.show_formspec(name, FORMNAME, table.concat(formspec, ""))
 end
@@ -107,4 +107,4 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 
 	return true
-end)
\ No newline at end of file
+end)
diff --git a/ui/message.lua b/ui/message.lua
index 3fb999f..130ebc9 100644
--- a/ui/message.lua
+++ b/ui/message.lua
@@ -10,18 +10,18 @@ function mail.show_message(name, id)
 
 			button[7.25,0.15;0.75,0.5;back;X]
 
-			label[0.2,0.1;From: %s]
-			label[0.2,0.5;To: %s]
-			label[0.2,0.9;CC: %s]
-			label[0.2,1.3;Date: %s]
+			label[0.2,0.1;]] .. S("From") .. [[: %s]
+			label[0.2,0.5;]] .. S("To") .. [[: %s]
+			label[0.2,0.9;]] .. S("CC") .. [[: %s]
+			label[0.2,1.3;]] .. S("Date") .. [[: %s]
 
-			label[0,2.1;Subject: %s]
+			label[0,2.1;]] .. S("Subject") .. [[: %s]
 			textarea[0.25,2.6;8,7.0;;;%s]
 
-			button[0,8.5;2,1;reply;Reply]
-			button[2,8.5;2,1;replyall;Reply All]
-			button[4,8.5;2,1;forward;Forward]
-			button[6,8.5;2,1;delete;Delete]
+			button[0,8.5;2,1;reply;]] .. S("Reply") .. [[]
+			button[2,8.5;2,1;replyall;]] .. S("Reply all") .. [[]
+			button[4,8.5;2,1;forward;]] .. S("Forward") .. [[]
+			button[6,8.5;2,1;delete;]] .. S("Delete") .. [[]
 		]] .. mail.theme
 
 	local from = minetest.formspec_escape(message.from) or ""
@@ -133,4 +133,4 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 
 	return true
-end)
\ No newline at end of file
+end)
diff --git a/ui/outbox.lua b/ui/outbox.lua
index ae980a7..6377405 100644
--- a/ui/outbox.lua
+++ b/ui/outbox.lua
@@ -1,20 +1,19 @@
+local sent_formspec = "size[8.5,10;]" .. mail.theme .. [[
+    tabheader[0.3,1;boxtab;]] .. S("Inbox") .. "," .. S("Sent messages") .. [[;2;false;false]
 
-local sent_formspec = "size[8,10;]" .. mail.theme .. [[
-    tabheader[0.3,1;boxtab;Inbox,Sent messages;2;false;false]
-
-    button[6,0.10;2,0.5;new;New]
-    button[6,0.95;2,0.5;read;Read]
-    button[6,1.70;2,0.5;reply;Reply]
-    button[6,2.45;2,0.5;replyall;Reply All]
-    button[6,3.20;2,0.5;forward;Forward]
-    button[6,3.95;2,0.5;delete;Delete]
-    button[6,6.8;2,0.5;contacts;Contacts]
-    button[6,7.6;2,0.5;maillists;Mail lists]
-    button[6,8.7;2,0.5;about;About]
-    button_exit[6,9.5;2,0.5;quit;Close]
+    button[6,0.10;2.5,0.5;new;]] .. S("New") .. [[]
+    button[6,0.95;2.5,0.5;read;]] .. S("Read") .. [[]
+    button[6,1.70;2.5,0.5;reply;]] .. S("Reply") .. [[]
+    button[6,2.45;2.5,0.5;replyall;]] .. S("Reply all") .. [[]
+    button[6,3.20;2.5,0.5;forward;]] .. S("Forward") .. [[]
+    button[6,3.95;2.5,0.5;delete;]] .. S("Delete") .. [[]
+    button[6,6.8;2.5,0.5;contacts;]] .. S("Contacts") .. [[]
+    button[6,7.6;2.5,0.5;maillists;]] .. S("Mail lists") .. [[]
+    button[6,8.7;2.5,0.5;about;]] .. S("About") .. [[]
+    button_exit[6,9.5;2.5,0.5;quit;]] .. S("Close") .. [[]
 
     tablecolumns[color;text;text]
-    table[0,0.7;5.75,9.35;sent;#999,To,Subject]]
+    table[0,0.7;5.75,9.35;sent;#999,]] .. S("To") .. "," .. S("Subject")
 
 
 function mail.show_sent(name)
@@ -38,7 +37,7 @@ function mail.show_sent(name)
 					formspec[#formspec + 1] = minetest.formspec_escape(message.subject)
 				end
 			else
-				formspec[#formspec + 1] = "(No subject)"
+				formspec[#formspec + 1] = S("(No subject)")
 			end
 		end
 		if mail.selected_idxs.sent[name] then
@@ -47,7 +46,7 @@ function mail.show_sent(name)
 		end
 		formspec[#formspec + 1] = "]"
 	else
-		formspec[#formspec + 1] = "]label[2.25,4.5;No mail]"
+		formspec[#formspec + 1] = "]label[2.25,4.5;" .. S("No mail") .. "]"
 	end
 	minetest.show_formspec(name, "mail:sent", table.concat(formspec, ""))
 end
diff --git a/ui/select_contact.lua b/ui/select_contact.lua
index 74494a5..66ae71c 100644
--- a/ui/select_contact.lua
+++ b/ui/select_contact.lua
@@ -2,16 +2,16 @@ local FORMNAME = "mail:selectcontact"
 
 local select_contact_formspec = "size[8,9;]" .. mail.theme .. [[
     tablecolumns[color;text;text]
-    table[0,0;3.5,9;contacts;#999,Name,Note%s]
-    button[3.55,2.00;1.75,0.5;toadd;→ Add]
-    button[3.55,2.75;1.75,0.5;toremove;← Remove]
-    button[3.55,6.00;1.75,0.5;ccadd;→ Add]
-    button[3.55,6.75;1.75,0.5;ccremove;← Remove]
+    table[0,0;3.5,9;contacts;#999,]] .. S("Name") .. "," .. S("Note") .. [[%s]
+    button[3.55,2.00;1.75,0.5;toadd;→ ]] .. S("Add") .. [[]
+    button[3.55,2.75;1.75,0.5;toremove;← ]] .. S("Remove") .. [[]
+    button[3.55,6.00;1.75,0.5;ccadd;→ ]] .. S("Add") .. [[]
+    button[3.55,6.75;1.75,0.5;ccremove;← ]] .. S("Remove") .. [[]
     tablecolumns[color;text;text]
-    table[5.15,0.0;2.75,4.5;to;#999,TO:,Note%s]
+    table[5.15,0.0;2.75,4.5;to;#999,]] .. S("To") .. ":," .. S("Note") .. [[%s]
     tablecolumns[color;text;text]
-    table[5.15,4.6;2.75,4.5;cc;#999,CC:,Note%s]
-    button[3.55,8.25;1.75,0.5;back;Back]
+    table[5.15,4.6;2.75,4.5;cc;#999,]] .. S("CC") .. ":," .. S("Note") .. [[%s]
+    button[3.55,8.25;1.75,0.5;back;]] .. S("Back") .. [[]
 ]]
 
 
@@ -112,4 +112,4 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	mail.show_compose(name, draft.to, draft.subject, draft.body, draft.cc, draft.bcc)
 
 	return true
-end)
\ No newline at end of file
+end)