diff --git a/server/GameServer/Commands.lean b/server/GameServer/Commands.lean
index ad97e1c..b6aeb41 100644
--- a/server/GameServer/Commands.lean
+++ b/server/GameServer/Commands.lean
@@ -3,6 +3,7 @@ import GameServer.Inventory
 import GameServer.Options
 import GameServer.SaveData
 import GameServer.Hints
+import I18n
 
 open Lean Meta Elab Command
 
@@ -33,16 +34,17 @@ elab "Level" level:num : command => do
 
 /-- Define the title of the current game/world/level. -/
 elab "Title" t:str : command => do
+  let title ← t.getString.translate
   match ← getCurLayer with
-  | .Level => modifyCurLevel fun level => pure {level with title := t.getString}
-  | .World => modifyCurWorld  fun world => pure {world with title := t.getString}
+  | .Level => modifyCurLevel fun level => pure {level with title := title}
+  | .World => modifyCurWorld  fun world => pure {world with title := title}
   | .Game => modifyCurGame  fun game => pure {game with
       title := t.getString
-      tile := {game.tile with title := t.getString}}
+      tile := {game.tile with title := title}}
 
 /-- Define the introduction of the current game/world/level. -/
 elab "Introduction" t:str : command => do
-  let intro := t.getString
+  let intro ← t.getString.translate
   match ← getCurLayer with
   | .Level => modifyCurLevel fun level => pure {level with introduction := intro}
   | .World => modifyCurWorld  fun world => pure {world with introduction := intro}
@@ -50,7 +52,7 @@ elab "Introduction" t:str : command => do
 
 /-- Define the info of the current game. Used for e.g. credits -/
 elab "Info" t:str : command => do
-  let info:= t.getString
+  let info ← t.getString.translate
   match ← getCurLayer with
   | .Level =>
     logError "Can't use `Info` in a level!"
@@ -82,7 +84,7 @@ elab "Image" t:str : command => do
 /-- Define the conclusion of the current game or current level if some
 building a level. -/
 elab "Conclusion" t:str : command => do
-  let conclusion := t.getString
+  let conclusion ← t.getString.translate
   match ← getCurLayer with
   | .Level => modifyCurLevel fun level => pure {level with conclusion := conclusion}
   | .World => modifyCurWorld  fun world => pure {world with conclusion := conclusion}
@@ -95,13 +97,13 @@ elab "Prerequisites" t:str* : command => do
 
 /-- Short caption for the game (1 sentence) -/
 elab "CaptionShort" t:str : command => do
-  let caption := t.getString
+  let caption ← t.getString.translate
   modifyCurGame fun game => pure {game with
     tile := {game.tile with short := caption}}
 
 /-- More detailed description what the game is about (2-4 sentences). -/
 elab "CaptionLong" t:str : command => do
-  let caption := t.getString
+  let caption ← t.getString.translate
   modifyCurGame fun game => pure {game with
     tile := {game.tile with long := caption}}
 
@@ -142,6 +144,7 @@ TacticDoc rw "`rw` stands for rewrite, etc. "
  -/
 elab doc:docComment ? "TacticDoc" name:ident content:str ? : command => do
   let doc ← parseDocCommentLegacy doc content
+  let doc ← doc.translate
   modifyEnv (inventoryTemplateExt.addEntry · {
     type := .Tactic
     name := name.getId
@@ -166,6 +169,7 @@ The theorem/definition to have the same fully qualified name as in mathlib.
 elab doc:docComment ? "TheoremDoc" name:ident "as" displayName:str "in" category:str content:str ? :
     command => do
   let doc ← parseDocCommentLegacy doc content
+  let doc ← doc.translate
   modifyEnv (inventoryTemplateExt.addEntry · {
     type := .Lemma
     name := name.getId
@@ -195,6 +199,7 @@ The theorem/definition to have the same fully qualified name as in mathlib.
  -/
 elab doc:docComment ? "DefinitionDoc" name:ident "as" displayName:str template:str ? : command => do
   let doc ← parseDocCommentLegacy doc template
+  let doc ← doc.translate
   modifyEnv (inventoryTemplateExt.addEntry · {
     type := .Definition
     name := name.getId,
@@ -341,6 +346,9 @@ elab doc:docComment ? attrs:Parser.Term.attributes ?
   let lvlIdx ← getCurLevelIdx
 
   let docContent ← parseDocComment doc
+  let docContent ← match docContent with
+  | none => pure none
+  | some d => d.translate
 
   -- Save the messages before evaluation of the proof.
   let initMsgs ← modifyGet fun st => (st.messages, { st with messages := {} })
@@ -426,6 +434,12 @@ elab doc:docComment ? attrs:Parser.Term.attributes ?
           strict := strict == 1
           hidden := hidden == 1
         }
+
+      -- Note: The current setup for hints is a bit convoluted, but for now we need to
+      -- send the text once through i18n to register it in the env extension.
+      -- This could probably be rewritten once i18n works fully.
+      let _ ← hint.rawText.translate
+
       hints := hints.push hint
     else
       nonHintMsgs := nonHintMsgs.push msg
diff --git a/server/GameServer/SaveData.lean b/server/GameServer/SaveData.lean
index 49f6548..59443e0 100644
--- a/server/GameServer/SaveData.lean
+++ b/server/GameServer/SaveData.lean
@@ -1,8 +1,8 @@
 import GameServer.EnvExtensions
+import I18n
 
 open Lean Meta Elab Command
 
-
 /-! ## Copy images -/
 
 open IO.FS System FilePath in
@@ -59,6 +59,9 @@ def saveGameData (allItemsByType : HashMap InventoryType (HashSet Name))
 
   IO.FS.writeFile (path / inventoryFileName) (toString (toJson inventory))
 
+  -- write PO file for translation
+  I18n.createPOTemplate
+
 open GameData
 
 def loadData (f : System.FilePath) (α : Type) [FromJson α] : IO α := do
diff --git a/server/lake-manifest.json b/server/lake-manifest.json
index fce8027..90b7d96 100644
--- a/server/lake-manifest.json
+++ b/server/lake-manifest.json
@@ -9,6 +9,21 @@
    "manifestFile": "lake-manifest.json",
    "inputRev": "v4.5.0",
    "inherited": false,
+   "configFile": "lakefile.lean"},
+  {"type": "path",
+   "name": "time",
+   "manifestFile": "lake-manifest.json",
+   "inherited": true,
+   "dir": ".lake/packages/i18n/./time",
+   "configFile": "lakefile.lean"},
+  {"url": "https://github.com/hhu-adam/lean-i18n.git",
+   "type": "git",
+   "subDir": null,
+   "rev": "cd22ffcb59cb8e01bb6d17e997389233e9a11177",
+   "name": "i18n",
+   "manifestFile": "lake-manifest.json",
+   "inputRev": "main",
+   "inherited": false,
    "configFile": "lakefile.lean"}],
  "name": "GameServer",
  "lakeDir": ".lake"}
diff --git a/server/lakefile.lean b/server/lakefile.lean
index 1e99ae0..4958eb8 100644
--- a/server/lakefile.lean
+++ b/server/lakefile.lean
@@ -7,8 +7,7 @@ package GameServer
 def leanVersion : String := s!"v{Lean.versionString}"
 
 require std from git "https://github.com/leanprover/std4.git" @ leanVersion
-
--- require importGraph from git "https://github.com/leanprover-community/import-graph" @ leanVersion
+require i18n from git "https://github.com/hhu-adam/lean-i18n.git" @ "main"
 
 lean_lib GameServer