diff --git a/trytond/ir/lang.py b/trytond/ir/lang.py
index ec74d70b39..3126d4f0c6 100644
--- a/trytond/ir/lang.py
+++ b/trytond/ir/lang.py
@@ -290,7 +290,8 @@ class Lang(DeactivableMixin, ModelSQL, ModelView):
             if (lang.code == Config.get_language()
                     and not lang.translatable):
                 raise TranslatableError(
-                    gettext('ir.msg_language_default_translatable'))
+                    gettext('ir.msg_language_default_translatable',
+                        language=lang.rec_name))
 
     @staticmethod
     def check_xml_record(langs, values):
@@ -337,7 +338,8 @@ class Lang(DeactivableMixin, ModelSQL, ModelView):
         for lang in langs:
             if lang.code == Config.get_language():
                 raise DeleteDefaultError(
-                    gettext('ir.msg_language_delete_default'))
+                    gettext('ir.msg_language_delete_default',
+                        language=lang.rec_name))
         # Clear cache
         cls._lang_cache.clear()
         cls._code_cache.clear()
diff --git a/trytond/ir/message.xml b/trytond/ir/message.xml
index 53328f2e0d..f64364dc47 100644
--- a/trytond/ir/message.xml
+++ b/trytond/ir/message.xml
@@ -256,10 +256,10 @@ this repository contains the full copyright notices and license terms. -->
             <field name="text">Invalid date format "%(format)s" for language "%(language)s".</field>
         </record>
         <record model="ir.message" id="msg_language_default_translatable">
-            <field name="text">The default language must be translatable.</field>
+            <field name="text">The default language "%(language)s" must be translatable.</field>
         </record>
         <record model="ir.message" id="msg_language_delete_default">
-            <field name="text">The default language can not be deleted.</field>
+            <field name="text">The default language "%(language)s" can not be deleted.</field>
         </record>
 
         <record model="ir.message" id="msg_rule_invalid_domain">