diff --git a/odoo/addons/base/i18n/base.pot b/odoo/addons/base/i18n/base.pot
index 84c5f806b7f..3afe8711235 100644
--- a/odoo/addons/base/i18n/base.pot
+++ b/odoo/addons/base/i18n/base.pot
@@ -11341,16 +11341,6 @@ msgstr ""
 msgid "File"
 msgstr ""
 
-#. module: base
-#: code:addons/base/wizard/base_import_language.py:0
-#, python-format
-msgid ""
-"File %r not imported due to format mismatch or a malformed file. (Valid formats are .csv, .po, .pot)\n"
-"\n"
-"Technical Details:\n"
-"%s"
-msgstr ""
-
 #. module: base
 #: code:addons/base/models/ir_ui_view.py:0
 #, python-format
@@ -11385,6 +11375,31 @@ msgid ""
 "                                                          Useful to (hard) reset broken views or to read arch from file in dev-xml mode."
 msgstr ""
 
+#. module: base
+#: code:addons/base/wizard/base_import_language.py:0
+#, python-format
+msgid "File %r not imported due to a malformed file.\n"
+"\n"
+"This issue can be caused by duplicates entries who are referring to the same field. Please check the content of the file you are trying to import.\n"
+"\n"
+"Technical Details:\n"
+"%s"
+msgstr ""
+
+#. module: base
+#: code:addons/base/wizard/base_import_language.py:0
+#, python-format
+msgid "File %r not imported due to format mismatch or a malformed file. (Valid formats are .csv, .po, .pot)\n"
+"\n"
+"Technical Details:\n"
+"%s"
+msgstr ""
+
+#. module: base
+#: model:ir.model.fields,field_description:base.field_ir_attachment__datas_fname
+msgid "Filename"
+msgstr ""
+
 #. module: base
 #: model:ir.model.fields,field_description:base.field_ir_actions_act_window__filter
 msgid "Filter"
diff --git a/odoo/addons/base/wizard/base_import_language.py b/odoo/addons/base/wizard/base_import_language.py
index d85fad07610..be2da88318b 100644
--- a/odoo/addons/base/wizard/base_import_language.py
+++ b/odoo/addons/base/wizard/base_import_language.py
@@ -5,8 +5,10 @@ import base64
 import logging
 import os
 from tempfile import TemporaryFile
+from psycopg2 import ProgrammingError
+from contextlib import closing
 
-from odoo import api, fields, models, tools, _
+from odoo import api, fields, models, tools, sql_db, _
 from odoo.exceptions import UserError
 
 _logger = logging.getLogger(__name__)
@@ -44,6 +46,14 @@ class BaseLanguageImport(models.TransientModel):
                 tools.trans_load_data(
                     this._cr, buf, fileformat, this.code, overwrite=self.overwrite
                 )
+            except ProgrammingError as e:
+                _logger.exception('File unsuccessfully imported, due to a malformed file.')
+
+                with closing(sql_db.db_connect(self._cr.dbname).cursor()) as cr:
+                    raise UserError(_('File %r not imported due to a malformed file.\n\n'
+                                      'This issue can be caused by duplicates entries who are referring to the same field. '
+                                      'Please check the content of the file you are trying to import.\n\n'
+                                      'Technical Details:\n%s') % tools.ustr(e))
             except Exception as e:
                 _logger.exception('File unsuccessfully imported, due to format mismatch.')
                 raise UserError(