diff --git a/README.md b/README.md
index 0210d2c..5ae87fe 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Available addons
 ----------------
 addon | version | maintainers | summary
 --- | --- | --- | ---
-[account_ebics](account_ebics/) | 18.0.1.0.1 |  | EBICS banking protocol
+[account_ebics](account_ebics/) | 18.0.1.0.2 |  | EBICS banking protocol
 [account_ebics_batch](account_ebics_batch/) | 18.0.1.0.0 |  | EBICS Files automated import and processing
 [account_ebics_batch_payment](account_ebics_batch_payment/) | 18.0.1.0.0 |  | Upload Batch Payment via EBICS
 [account_ebics_oca_statement_import](account_ebics_oca_statement_import/) | 18.0.1.0.0 |  | Use OCA Bank Statement Import with account_ebics
diff --git a/account_ebics/__manifest__.py b/account_ebics/__manifest__.py
index 1c35b64..154190e 100644
--- a/account_ebics/__manifest__.py
+++ b/account_ebics/__manifest__.py
@@ -3,7 +3,7 @@
 
 {
     "name": "EBICS banking protocol",
-    "version": "18.0.1.0.1",
+    "version": "18.0.1.0.2",
     "license": "LGPL-3",
     "author": "Noviat",
     "website": "https://www.noviat.com/",
diff --git a/account_ebics/models/ebics_userid.py b/account_ebics/models/ebics_userid.py
index a37e91c..c4a6ae9 100644
--- a/account_ebics/models/ebics_userid.py
+++ b/account_ebics/models/ebics_userid.py
@@ -28,6 +28,8 @@ try:
 except ImportError:
     _logger.warning("Failed to import fintech")
 
+INI_LETTER_LANGS = ["en", "de", "fr"]
+
 
 class EbicsBank(EbicsBank):
     def _next_order_id(self, partnerid):
@@ -475,6 +477,8 @@ class EbicsUserID(models.Model):
         else:
             lang = self.env.user.lang or self.env["res.lang"].search([])[0].code
             lang = lang[:2]
+        lang = lang.lower()
+        lang = lang if lang in INI_LETTER_LANGS else "en"
         fn_date = fields.Date.today().isoformat()
         fn = "_".join([self.ebics_config_id.ebics_host, "ini_letter", fn_date]) + ".pdf"
         letter = user.create_ini_letter(bankname=ebics_config_bank.name, lang=lang)