diff --git a/locale/fr/LC_MESSAGES/rougail.po b/locale/fr/LC_MESSAGES/rougail.po
index a76ad4539..982500bf5 100644
--- a/locale/fr/LC_MESSAGES/rougail.po
+++ b/locale/fr/LC_MESSAGES/rougail.po
@@ -5,8 +5,8 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: \n"
-"POT-Creation-Date: 2025-10-04 16:06+0200\n"
-"PO-Revision-Date: 2025-10-04 16:06+0200\n"
+"POT-Creation-Date: 2025-10-26 15:26+0100\n"
+"PO-Revision-Date: 2025-10-26 15:28+0100\n"
 "Last-Translator: \n"
 "Language-Team: \n"
 "Language: fr\n"
@@ -16,31 +16,31 @@ msgstr ""
 "Generated-By: pygettext.py 1.5\n"
 "X-Generator: Poedit 3.7\n"
 
-#: src/rougail/annotator/family.py:150
+#: src/rougail/annotator/family.py:151
 msgid "default variable mode \"{0}\" is not a valid mode, valid modes are {1}"
 msgstr ""
 "le mode d'une variable par défaut \"{0}\" n'est pas un mode valide, les "
 "modes valides sont {1}"
 
-#: src/rougail/annotator/family.py:156
+#: src/rougail/annotator/family.py:157
 msgid "default family mode \"{0}\" is not a valid mode, valid modes are {1}"
 msgstr ""
 "le mode d'une famille par défaut \"{0}\" n'est pas un mode valide, les modes "
 "valides sont {1}"
 
-#: src/rougail/annotator/family.py:188
+#: src/rougail/annotator/family.py:189
 msgid "mode \"{0}\" for \"{1}\" is not a valid mode, valid modes are {2}"
 msgstr ""
 "le mode \"{0}\" pour \"{1}\" n'est pas un mode valide, les modes valides "
 "sont {2}"
 
-#: src/rougail/annotator/family.py:192
+#: src/rougail/annotator/family.py:193
 msgid "mode \"{0}\" for \"{1}\" is not a valid mode, no modes are available"
 msgstr ""
 "le mode \"{0}\" pour \"{1}\" n'est pas un mode valide, aucun mode ne sont "
 "définis"
 
-#: src/rougail/annotator/family.py:256
+#: src/rougail/annotator/family.py:257
 msgid ""
 "the variable \"{0}\" is mandatory so in \"{1}\" mode but family has the "
 "higher family mode \"{2}\""
@@ -48,7 +48,7 @@ msgstr ""
 "la variable \"{0}\" est obligatoire, donc en mode \"{1}\", mais la famille a "
 "un mode supérieur \"{2}\""
 
-#: src/rougail/annotator/family.py:294
+#: src/rougail/annotator/family.py:295
 msgid ""
 "the follower \"{0}\" is in \"{1}\" mode but leader have the higher mode "
 "\"{2}\""
@@ -56,7 +56,7 @@ msgstr ""
 "la variable suiveuse \"{0}\" a le mode \"{1}\" mais la variable leader a un "
 "mode supérieur \"{2}\""
 
-#: src/rougail/annotator/family.py:327
+#: src/rougail/annotator/family.py:328
 msgid ""
 "the family \"{0}\" is in \"{1}\" mode but variables and families inside have "
 "the higher modes \"{2}\""
@@ -64,7 +64,7 @@ msgstr ""
 "la famille \"{0}\" a le mode \"{1}\" mais les variables et les familles à "
 "l'intérieur ont des modes supérieurs \"{2}\""
 
-#: src/rougail/annotator/family.py:345
+#: src/rougail/annotator/family.py:346
 msgid ""
 "the variable \"{0}\" is in \"{1}\" mode but family has the higher family "
 "mode \"{2}\""
@@ -72,6 +72,28 @@ msgstr ""
 "la variable \"{0}\" est dans le mode \"{1}\" mais la famille a le mode "
 "supérieur \"{2}\""
 
+#: src/rougail/annotator/property.py:158
+msgid ""
+"invalid tag name \"{0}\" should only contains lowercase ascii character, "
+"number or _"
+msgstr ""
+"nom de l'étiquette invalide \"{0}\" doit seulement contenir des caractères "
+"ascii minuscule, nombre or _"
+
+#: src/rougail/annotator/property.py:163
+msgid "invalid tag name \"{0}\" should not be a name of an existing mode"
+msgstr ""
+"nom de l'étiquette invalide \"{0}\" ne doit pas être un nom de mode existant"
+
+#: src/rougail/annotator/property.py:168
+#, fuzzy
+#| msgid ""
+#| "invalid tag name \"{0}\" should not be name of an available proprerties"
+msgid "invalid tag name \"{0}\" should not be name of an available properties"
+msgstr ""
+"nom de l'étiquette invalide \"{0}\" ne doit pas être le nom d'une propriétés "
+"existantes"
+
 #: src/rougail/annotator/value.py:78
 msgid ""
 "the follower \"{0}\" is not multi, so cannot have a list has default value"
@@ -117,129 +139,129 @@ msgstr ""
 "la variable \"{0}\" a l'attribut \"secret_manager\" donc ne devrait pas "
 "avoir de valeur par défaut"
 
-#: src/rougail/annotator/variable.py:253
+#: src/rougail/annotator/variable.py:254
 msgid ""
 "the variable \"{0}\" has regexp attribut but has not the \"regexp\" type"
 msgstr ""
 "la variable \"{0}\" a un attribut regexp mais n'a pas le type \"regexp\""
 
-#: src/rougail/annotator/variable.py:296
+#: src/rougail/annotator/variable.py:297
 msgid ""
 "the variable \"{0}\" has choices attribut but has not the \"choice\" type"
 msgstr ""
 "la variable \"{0}\" a un attribut choices mais n'a pas le type \"choice\""
 
-#: src/rougail/annotator/variable.py:324
+#: src/rougail/annotator/variable.py:325
 msgid ""
 "the variable \"{0}\" has an unvalid default value \"{1}\" should be in {2}"
 msgstr ""
 "la variable \"{0}\" a la valeur par défaut invalide \"{1}\" devrait être {2}"
 
-#: src/rougail/config/__init__.py:226
+#: src/rougail/config/__init__.py:235
 msgid "Structure format version by default, if not specified in structure file"
 msgstr ""
 "La version du format de la structure par défaut, si non spécifier dans le "
 "fichier de structure"
 
-#: src/rougail/config/__init__.py:234
+#: src/rougail/config/__init__.py:243
 msgid "File with functions"
 msgstr "Fichier avec les fonctions"
 
-#: src/rougail/config/__init__.py:246
+#: src/rougail/config/__init__.py:255
 msgid "All modes level available"
 msgstr "Tous les niveaux de modes valides"
 
-#: src/rougail/config/__init__.py:258
+#: src/rougail/config/__init__.py:267
 msgid "Default mode for a family"
 msgstr "Mode par défaut pour une famille"
 
-#: src/rougail/config/__init__.py:278
+#: src/rougail/config/__init__.py:287
 msgid "Default mode for a variable"
 msgstr "Mode par défaut pour une variable"
 
-#: src/rougail/config/__init__.py:302
+#: src/rougail/config/__init__.py:311
 msgid "Option name for the base option"
 msgstr "Nom de l'option pour l'option de base"
 
-#: src/rougail/config/__init__.py:307
+#: src/rougail/config/__init__.py:316
 msgid "In cache file, do not importation of Tiramisu and other dependencies"
 msgstr ""
 "Dans le fichier de cache, ne pas importer Tiramisu et autres dépendances"
 
-#: src/rougail/config/__init__.py:312
+#: src/rougail/config/__init__.py:321
 msgid "Tiramisu cache filename"
 msgstr "Nom du fichier du cache Tiramisu"
 
-#: src/rougail/config/__init__.py:320
+#: src/rougail/config/__init__.py:329
 msgid "Name of internal functions that we can use as a function"
 msgstr ""
 "Nom des fonctions internes qu'il est possible d'utiliser comme fonction"
 
-#: src/rougail/config/__init__.py:326
+#: src/rougail/config/__init__.py:335
 msgid "Name of extra annotators"
 msgstr "Nom des annotators supplémentaires"
 
-#: src/rougail/config/__init__.py:332
+#: src/rougail/config/__init__.py:341
 msgid "Suffix add to generated options name"
 msgstr "Suffix ajouté pour généré le nom des options"
 
-#: src/rougail/config/__init__.py:338
+#: src/rougail/config/__init__.py:347
 msgid "Every variables in calculation are optionals"
 msgstr "Toutes les variables dans un calcul sont optionnelles"
 
-#: src/rougail/config/__init__.py:342
+#: src/rougail/config/__init__.py:351
 msgid "Loads redefine variables even if there don't already exists"
 msgstr "Charger les variables redéfinis même si elles n'existe pas"
 
-#: src/rougail/config/__init__.py:349
+#: src/rougail/config/__init__.py:358
 msgid "The secret pattern to build item name in Bitwarden"
 msgstr "Le patron de secret pour construire le nom de l'élément dans Bitwarden"
 
-#: src/rougail/config/__init__.py:350
+#: src/rougail/config/__init__.py:359
 msgid "The pattern is in Jinja format"
 msgstr "Le patron est au format Jinja"
 
-#: src/rougail/config/__init__.py:378
+#: src/rougail/config/__init__.py:387
 msgid "Select for {0}"
 msgstr "Sélection pour {0}"
 
-#: src/rougail/config/__init__.py:458
+#: src/rougail/config/__init__.py:467
 msgid "Override default parameters for option type"
 msgstr "Sur charger les paramètre par défaut pour le type d'option"
 
-#: src/rougail/config/__init__.py:461
+#: src/rougail/config/__init__.py:470
 msgid "Default parameters for option type"
 msgstr "Paramètre par défaut pour le type d'option"
 
-#: src/rougail/convert/convert.py:280
+#: src/rougail/convert/convert.py:281
 msgid "unknown type {0} for {1}"
 msgstr "type {0} inconnu pour {1}"
 
-#: src/rougail/convert/convert.py:418
+#: src/rougail/convert/convert.py:419
 msgid "family \"{0}\" define multiple time"
 msgstr "la famille \"{0}\" est définit plusieurs fois"
 
-#: src/rougail/convert/convert.py:671
+#: src/rougail/convert/convert.py:672
 msgid "variable \"{0}\" define multiple time"
 msgstr "la variable \"{0}\" est définit plusieurs fois"
 
-#: src/rougail/convert/convert.py:769
+#: src/rougail/convert/convert.py:770
 msgid "params must be a dict for {0}"
 msgstr "params doit être une dict pour {0}"
 
-#: src/rougail/convert/convert.py:790
+#: src/rougail/convert/convert.py:791
 msgid "\"{0}\" has an invalid \"params\" for {1}: {2}"
 msgstr "\"{0}\" a un attribut \"params\" invalide pour {1}: {2}"
 
-#: src/rougail/convert/convert.py:804
+#: src/rougail/convert/convert.py:805
 msgid "secret_manager must be a dict for {0}"
 msgstr "secret_manager doit être une dict pour {0}"
 
-#: src/rougail/convert/convert.py:1133
+#: src/rougail/convert/convert.py:1134
 msgid "Cannot execute annotate multiple time"
 msgstr "Ne peut exécuter l'annotation plusieurs fois"
 
-#: src/rougail/convert/convert.py:1140
+#: src/rougail/convert/convert.py:1141
 msgid ""
 "invalid \"structural\" definition ({0}), we cannot load any structural file!"
 msgstr ""
@@ -260,7 +282,7 @@ msgstr ""
 "\"{2}\""
 
 #: src/rougail/convert/object_model.py:133
-#: src/rougail/convert/object_model.py:468
+#: src/rougail/convert/object_model.py:479
 msgid "unknown object \"{0}\" in attribute \"{1}\" for \"{2}\""
 msgstr "objet inconnu \"{0}\" dans l'attribut \"{1}\" pour \"{2}\""
 
@@ -289,7 +311,15 @@ msgstr ""
 "la variable \"{0}\" n'est pas suiveuse, donc ne peut avoir de type index "
 "comme paramètre dans \"{1}\""
 
-#: src/rougail/convert/object_model.py:463
+#: src/rougail/convert/object_model.py:405
+msgid ""
+"variable \"{0}\" has a calculating \"{1}\" with an invalid return_type, "
+"should be boolean or string, not \"{2}\""
+msgstr ""
+"la variable \"{0}\" a un calcul \"{1}\" avec un return_type invalide, "
+"devrait être un booléen ou une chaîne de caractère, et pas \"{2}\""
+
+#: src/rougail/convert/object_model.py:474
 msgid ""
 "a variable \"{0}\" is needs in attribute \"{1}\" for \"{2}\" but it's a "
 "family"
@@ -297,7 +327,7 @@ msgstr ""
 "une variable \"{0}\" est nécessaire pour l'attribut \"{1}\" pour \"{2}\" "
 "mais c'est une famille"
 
-#: src/rougail/convert/object_model.py:488
+#: src/rougail/convert/object_model.py:499
 msgid ""
 "variable \"{0}\" has an attribute \"{1}\" calculated with the unknown "
 "variable \"{2}\""
@@ -305,7 +335,7 @@ msgstr ""
 "la variable \"{0}\" a un attribut invalide \"{1}\" calculé avec la variable "
 "inconnue \"{2}\""
 
-#: src/rougail/convert/object_model.py:540
+#: src/rougail/convert/object_model.py:551
 msgid ""
 "the variable \"{0}\" has an invalid \"{1}\" the variable \"{2}\" is in a sub "
 "dynamic option"
@@ -313,14 +343,14 @@ msgstr ""
 "la variable \"{0}\" a un attribut invalide \"{1}\", la variable \"{2}\" est "
 "dans une sous option dynamique"
 
-#: src/rougail/convert/object_model.py:549
+#: src/rougail/convert/object_model.py:560
 msgid ""
 "the leader \"{0}\" has an invalid \"{1}\" the follower \"{2}\" is a multi"
 msgstr ""
 "la variable meneuse \"{0}\" a un attribut invalide \"{1}\", la variable "
 "suiveuse \"{2}\" est multiple"
 
-#: src/rougail/convert/object_model.py:591
+#: src/rougail/convert/object_model.py:602
 msgid ""
 "the variable \"{0}\" has an invalid attribute \"{1}\", the variable \"{2}\" "
 "must not be multi"
@@ -328,7 +358,7 @@ msgstr ""
 "la variable \"{0}\" a un attribut invalide \"{1}\", la variable \"{2}\" ne "
 "doit pas être multiple"
 
-#: src/rougail/convert/object_model.py:605
+#: src/rougail/convert/object_model.py:616
 msgid ""
 "the variable \"{0}\" has an invalid attribute \"{1}\", the variable must not "
 "be a multi or the variable \"{2}\" must be multi"
@@ -336,7 +366,7 @@ msgstr ""
 "la variable \"{0}\" a un attribut invalide \"{1}\", la variable ne doit pas "
 "être multiple ou la variable \"{2}\" doit être multiple"
 
-#: src/rougail/convert/object_model.py:619
+#: src/rougail/convert/object_model.py:630
 msgid ""
 "the variable \"{0}\" has an invalid attribute \"{1}\", the variable must be "
 "a multi or the variable \"{2}\" must not be multi"
@@ -344,7 +374,7 @@ msgstr ""
 "la variable \"{0}\" a un attribut invalide \"{1}\", la variable doit être "
 "multiple ou la variable \"{2}\" ne doit pas être multiple"
 
-#: src/rougail/convert/object_model.py:633
+#: src/rougail/convert/object_model.py:644
 msgid ""
 "the variable \"{0}\" has an invalid attribute \"{1}\", the variable \"{2}\" "
 "is multi but is inside a list"
@@ -352,7 +382,7 @@ msgstr ""
 "la variable \"{0}\" a un attribut invalide \"{1}\", la variable \"{2}\" est "
 "multiple mais est dans une liste"
 
-#: src/rougail/convert/object_model.py:655
+#: src/rougail/convert/object_model.py:666
 msgid ""
 "the variable \"{0}\" is waiting for a list as \"{1}\" but the attribute "
 "\"default\" is not a list (\"{2}\")"
@@ -360,7 +390,7 @@ msgstr ""
 "la variable \"{0}\" attend une liste comme \"{1}\" mais l'attribut "
 "\"default\" n'est pas une liste \"{2}\""
 
-#: src/rougail/convert/object_model.py:657
+#: src/rougail/convert/object_model.py:668
 msgid ""
 "the variable \"{0}\" is not waiting for a list as \"{1}\" but the attribute "
 "\"default\" is a list (\"{2}\")"
@@ -368,7 +398,7 @@ msgstr ""
 "la variable \"{0}\" n'attend pas une liste comme \"{1}\" mais l'attribut "
 "\"default\" est une liste \"{2}\""
 
-#: src/rougail/convert/object_model.py:673
+#: src/rougail/convert/object_model.py:684
 msgid ""
 "\"{0}\" attribut shall not have an \"optional\" attribute without the "
 "\"default\" attribute for variable \"{1}\""
@@ -376,7 +406,7 @@ msgstr ""
 "l'attribut \"{0}\" ne devrait pas avoir d'attribut \"optional\" sans "
 "l'attribut \"default\" pour la variable \"{1}\""
 
-#: src/rougail/convert/object_model.py:697
+#: src/rougail/convert/object_model.py:708
 msgid ""
 "variable \"{0}\" has a default value calculated with \"{1}\" which has "
 "incompatible type"
@@ -384,7 +414,7 @@ msgstr ""
 "la variable \"{0}\" a une valeur par défaut calculé a partir de \"{1}\" "
 "laquelle a un type incompatible"
 
-#: src/rougail/convert/object_model.py:740
+#: src/rougail/convert/object_model.py:751
 msgid ""
 "the variable \"{0}\" is waiting for a boolean as \"{1}\" but the attribute "
 "\"default\" is not a boolean (\"{2}\")"
@@ -392,7 +422,7 @@ msgstr ""
 "la variable \"{0}\" attend un booléan comme \"{1}\" mais l'attribut "
 "\"default\" n'est pas une booléan (\"{2}\")"
 
-#: src/rougail/convert/object_model.py:760
+#: src/rougail/convert/object_model.py:771
 msgid ""
 "\"when\" is not allowed in format version 1.0 for attribute \"{0}\" for "
 "variable \"{1}\""
@@ -400,7 +430,7 @@ msgstr ""
 "\"when\" n'est pas autorisé avec le format en version 1.0 pour l'attribut "
 "\"{0}\" pour la variable \"{1}\""
 
-#: src/rougail/convert/object_model.py:765
+#: src/rougail/convert/object_model.py:776
 msgid ""
 "the variable \"{0}\" has an invalid attribute \"{1}\", \"when\" and "
 "\"when_not\" cannot set together"
@@ -408,7 +438,7 @@ msgstr ""
 "la variable \"{0}\" a un attribut invalide \"{1}\", \"when\" et \"when_not\" "
 "ne peuvent pas être défini ensemble"
 
-#: src/rougail/convert/object_model.py:773
+#: src/rougail/convert/object_model.py:784
 msgid ""
 "\"when_not\" is not allowed in format version 1.0 for attribute \"{0}\" for "
 "variable \"{1}\""
@@ -416,7 +446,7 @@ msgstr ""
 "\"when_not\" n'est pas autorisé au format 1.0 pour l'attribut \"{0}\" pour "
 "la variable variable \"{1}\""
 
-#: src/rougail/convert/object_model.py:829
+#: src/rougail/convert/object_model.py:840
 msgid ""
 "cannot find variable \"{0}\" for the information \"{1}\" when calculating "
 "\"{2}\""
@@ -424,19 +454,19 @@ msgstr ""
 "ne peut trouver la variable \"{0}\" pour l'information \"{1}\" lors du "
 "calcul de \"{2}\""
 
-#: src/rougail/convert/object_model.py:834
+#: src/rougail/convert/object_model.py:845
 msgid ""
 "identifier not allowed for the information \"{0}\" when calculating \"{1}\""
 msgstr ""
 "identifier n'est pas autorisé pour l'information \"{0}\" lors du calcul de "
 "\"{1}\""
 
-#: src/rougail/convert/object_model.py:886
+#: src/rougail/convert/object_model.py:897
 msgid "\"when\" is not allowed in format version 1.0 for attribute \"{0}\""
 msgstr "\"when\" n'est pas autorisé au format 1.0 pour l'attribut \"{0}\""
 
-#: src/rougail/convert/object_model.py:892
-#: src/rougail/convert/object_model.py:902
+#: src/rougail/convert/object_model.py:903
+#: src/rougail/convert/object_model.py:913
 msgid ""
 "the identifier has an invalid attribute \"{0}\", \"when\" and \"when_not\" "
 "cannot set together"
@@ -444,14 +474,14 @@ msgstr ""
 "l'identifiant a un attribut invalide \"{0}\", \"when\" et \"when_not\" ne "
 "peuvent pas être défini ensemble"
 
-#: src/rougail/convert/object_model.py:928
+#: src/rougail/convert/object_model.py:939
 msgid ""
 "the variable \"{0}\" is not a follower, so cannot have index type for \"{1}\""
 msgstr ""
 "la variable \"{0}\" n'est pas suiveuse, donc ne peut avoir de type index "
 "pour \"{1}\""
 
-#: src/rougail/convert/path.py:207
+#: src/rougail/convert/path.py:211
 msgid ""
 "A variable or a family located in the \"{0}\" namespace shall not be used in "
 "the \"{1}\" namespace"
@@ -464,7 +494,7 @@ msgid "internal error, {0} is not a dynamic variable"
 msgstr "erreur interne, \"{0}\" n'est pas une variable dynamique"
 
 #: src/rougail/error.py:61 src/rougail/tiramisu.py:157
-#: src/rougail/user_datas.py:377 src/rougail/user_datas.py:380
+#: src/rougail/user_datas.py:392 src/rougail/user_datas.py:395
 msgid "{0} in {1}"
 msgstr "{0} dans {1}"
 
@@ -476,7 +506,7 @@ msgstr "alternative_name \"{0}\" est en conflit avec \"--help\""
 msgid "conflict alternative_name \"{0}\": \"{1}\" and \"{2}\""
 msgstr "conflit dans les \"alternative_name\" \"{0}\": \"{1}\" et \"{2}\""
 
-#: src/rougail/structural_directory/__init__.py:127
+#: src/rougail/structural_directory/__init__.py:129
 msgid "duplicate structural file name {0}"
 msgstr "nom de fichier {0} de structure dupliqué"
 
@@ -493,14 +523,18 @@ msgid "Main namespace name"
 msgstr "Nom de l'espace de nom principal"
 
 #: src/rougail/structural_directory/config.py:69
+msgid "Namespaces are isolated"
+msgstr "Les espaces de noms sont isolés"
+
+#: src/rougail/structural_directory/config.py:78
 msgid "Extra namespaces"
 msgstr "Espaces de nom supplémentaires"
 
-#: src/rougail/structural_directory/config.py:78
+#: src/rougail/structural_directory/config.py:87
 msgid "Extra namespace name"
 msgstr "Nom de l'espace de nom supplémentaire"
 
-#: src/rougail/structural_directory/config.py:84
+#: src/rougail/structural_directory/config.py:93
 msgid "Directories where extra structural files are placed"
 msgstr ""
 "Répertoires où sont placés les fichiers de structure de l'espace de nom "
@@ -518,7 +552,7 @@ msgstr ""
 "ne peut calculer l'attribut \"{0}\" pour la variable \"{1}\" dans {2} avec "
 "les paramètres \"{3}\" : {4}"
 
-#: src/rougail/user_datas.py:137
+#: src/rougail/user_datas.py:135
 msgid ""
 "cannot load variable path \"{0}\", the identifier \"{1}\" is not valid in {2}"
 msgstr ""
@@ -531,19 +565,19 @@ msgstr ""
 "la variable \"{0}\" contient des secrets et ne devrait pas être défini dans "
 "{1}"
 
-#: src/rougail/user_datas.py:250
+#: src/rougail/user_datas.py:257
 msgid "loaded from {0}"
 msgstr "chargée depuis {0}"
 
-#: src/rougail/user_datas.py:280
+#: src/rougail/user_datas.py:297
 msgid ""
 "cannot set the value \"{0}\" to the family {1}, it will be ignored when "
 "loading from {2}"
 msgstr ""
 "impossible de définir la valeur \"{0}\" à la famille {1}, elle sera ignorée "
-"lors du chargement depuis {0}"
+"lors du chargement depuis {2}"
 
-#: src/rougail/user_datas.py:292
+#: src/rougail/user_datas.py:309
 msgid ""
 "variable or family \"{0}\" does not exist, it will be ignored when loading "
 "from {1}"
@@ -551,7 +585,7 @@ msgstr ""
 "la variable ou la famille \"{0}\" n'existe pas, elle sera ignorée lors du "
 "chargement depuis {1}"
 
-#: src/rougail/user_datas.py:298
+#: src/rougail/user_datas.py:315
 msgid ""
 "\"{0}\" is the name of a dynamic family, it will be ignored when loading "
 "from {1}"
@@ -559,11 +593,11 @@ msgstr ""
 "\"{0}\" est le nom d'une famille dynamique, il sera ignoré lors du "
 "chargement depuis {1}"
 
-#: src/rougail/user_datas.py:304
+#: src/rougail/user_datas.py:321
 msgid "{0} loaded from {1}"
 msgstr "{0} chargée depuis {1}"
 
-#: src/rougail/user_datas.py:334
+#: src/rougail/user_datas.py:349
 msgid ""
 "variable {0} at index \"{1}\" is {2}, it will be ignored when loading from "
 "{3}"
@@ -571,23 +605,23 @@ msgstr ""
 "la variable {0} à l'index \"{1}\" est {2}, elle sera ignorée lors du "
 "chargement depuis {3}"
 
-#: src/rougail/user_datas.py:345
+#: src/rougail/user_datas.py:360
 msgid ""
 "family {0} is {1}, {2} at index \"{3}\" will be ignored when loading from {4}"
 msgstr ""
 "la famille {0} est {1}, {2} à l'index \"{3}\" sera ignorée lors du "
 "chargement depuis {4}"
 
-#: src/rougail/user_datas.py:358
+#: src/rougail/user_datas.py:373
 msgid "variable {0} is {1}, it will be ignored when loading from {2}"
 msgstr ""
 "la variable {0} est {1}, elle sera ignorée lors du chargement depuis {2}"
 
-#: src/rougail/user_datas.py:366
+#: src/rougail/user_datas.py:381
 msgid "family {0} is {1}, {2} will be ignored when loading from {3}"
 msgstr "la famille {0} est {1}, {2} sera ignorée lors du chargement depuis {3}"
 
-#: src/rougail/user_datas.py:386
+#: src/rougail/user_datas.py:401
 msgid ""
 "the value \"{0}\" is an invalid {1} for {2} at index \"{3}\", {4}, it will "
 "be ignored when loading from {5}"
@@ -595,7 +629,7 @@ msgstr ""
 "la valeur \"{0}\" est un invalide {1} pour {2} à l'index \"{3}\", {4}, elle "
 "sera ignorée lors du chargement depuis {5}"
 
-#: src/rougail/user_datas.py:401
+#: src/rougail/user_datas.py:415
 msgid ""
 "the value \"{0}\" is an invalid {1} for {2}, {3}, it will be ignored when "
 "loading from {4}"
diff --git a/locale/rougail.pot b/locale/rougail.pot
index d206c2d98..df2bb5481 100644
--- a/locale/rougail.pot
+++ b/locale/rougail.pot
@@ -5,7 +5,7 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
-"POT-Creation-Date: 2025-10-05 21:37+0200\n"
+"POT-Creation-Date: 2025-10-26 15:29+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -15,38 +15,50 @@ msgstr ""
 "Generated-By: pygettext.py 1.5\n"
 
 
-#: src/rougail/annotator/family.py:150
+#: src/rougail/annotator/family.py:151
 msgid "default variable mode \"{0}\" is not a valid mode, valid modes are {1}"
 msgstr ""
 
-#: src/rougail/annotator/family.py:156
+#: src/rougail/annotator/family.py:157
 msgid "default family mode \"{0}\" is not a valid mode, valid modes are {1}"
 msgstr ""
 
-#: src/rougail/annotator/family.py:188
+#: src/rougail/annotator/family.py:189
 msgid "mode \"{0}\" for \"{1}\" is not a valid mode, valid modes are {2}"
 msgstr ""
 
-#: src/rougail/annotator/family.py:192
+#: src/rougail/annotator/family.py:193
 msgid "mode \"{0}\" for \"{1}\" is not a valid mode, no modes are available"
 msgstr ""
 
-#: src/rougail/annotator/family.py:256
+#: src/rougail/annotator/family.py:257
 msgid "the variable \"{0}\" is mandatory so in \"{1}\" mode but family has the higher family mode \"{2}\""
 msgstr ""
 
-#: src/rougail/annotator/family.py:294
+#: src/rougail/annotator/family.py:295
 msgid "the follower \"{0}\" is in \"{1}\" mode but leader have the higher mode \"{2}\""
 msgstr ""
 
-#: src/rougail/annotator/family.py:327
+#: src/rougail/annotator/family.py:328
 msgid "the family \"{0}\" is in \"{1}\" mode but variables and families inside have the higher modes \"{2}\""
 msgstr ""
 
-#: src/rougail/annotator/family.py:345
+#: src/rougail/annotator/family.py:346
 msgid "the variable \"{0}\" is in \"{1}\" mode but family has the higher family mode \"{2}\""
 msgstr ""
 
+#: src/rougail/annotator/property.py:158
+msgid "invalid tag name \"{0}\" should only contains lowercase ascii character, number or _"
+msgstr ""
+
+#: src/rougail/annotator/property.py:163
+msgid "invalid tag name \"{0}\" should not be a name of an existing mode"
+msgstr ""
+
+#: src/rougail/annotator/property.py:168
+msgid "invalid tag name \"{0}\" should not be name of an available properties"
+msgstr ""
+
 #: src/rougail/annotator/value.py:78
 msgid "the follower \"{0}\" is not multi, so cannot have a list has default value"
 msgstr ""
@@ -75,15 +87,15 @@ msgstr ""
 msgid "the variable \"{0}\" has attribute \"secret_manager\" so must not have default value"
 msgstr ""
 
-#: src/rougail/annotator/variable.py:253
+#: src/rougail/annotator/variable.py:254
 msgid "the variable \"{0}\" has regexp attribut but has not the \"regexp\" type"
 msgstr ""
 
-#: src/rougail/annotator/variable.py:296
+#: src/rougail/annotator/variable.py:297
 msgid "the variable \"{0}\" has choices attribut but has not the \"choice\" type"
 msgstr ""
 
-#: src/rougail/annotator/variable.py:324
+#: src/rougail/annotator/variable.py:325
 msgid "the variable \"{0}\" has an unvalid default value \"{1}\" should be in {2}"
 msgstr ""
 
@@ -159,35 +171,35 @@ msgstr ""
 msgid "Default parameters for option type"
 msgstr ""
 
-#: src/rougail/convert/convert.py:280
+#: src/rougail/convert/convert.py:281
 msgid "unknown type {0} for {1}"
 msgstr ""
 
-#: src/rougail/convert/convert.py:418
+#: src/rougail/convert/convert.py:419
 msgid "family \"{0}\" define multiple time"
 msgstr ""
 
-#: src/rougail/convert/convert.py:671
+#: src/rougail/convert/convert.py:672
 msgid "variable \"{0}\" define multiple time"
 msgstr ""
 
-#: src/rougail/convert/convert.py:769
+#: src/rougail/convert/convert.py:770
 msgid "params must be a dict for {0}"
 msgstr ""
 
-#: src/rougail/convert/convert.py:790
+#: src/rougail/convert/convert.py:791
 msgid "\"{0}\" has an invalid \"params\" for {1}: {2}"
 msgstr ""
 
-#: src/rougail/convert/convert.py:804
+#: src/rougail/convert/convert.py:805
 msgid "secret_manager must be a dict for {0}"
 msgstr ""
 
-#: src/rougail/convert/convert.py:1133
+#: src/rougail/convert/convert.py:1134
 msgid "Cannot execute annotate multiple time"
 msgstr ""
 
-#: src/rougail/convert/convert.py:1140
+#: src/rougail/convert/convert.py:1141
 msgid "invalid \"structural\" definition ({0}), we cannot load any structural file!"
 msgstr ""
 
@@ -200,7 +212,7 @@ msgid "the variable \"{0}\" is in fact a family in attribute \"{1}\" for \"{2}\"
 msgstr ""
 
 #: src/rougail/convert/object_model.py:133
-#: src/rougail/convert/object_model.py:468
+#: src/rougail/convert/object_model.py:479
 msgid "unknown object \"{0}\" in attribute \"{1}\" for \"{2}\""
 msgstr ""
 
@@ -220,92 +232,96 @@ msgstr ""
 msgid "the variable \"{0}\" is not a follower, so cannot have index type for param in \"{1}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:463
+#: src/rougail/convert/object_model.py:405
+msgid "variable \"{0}\" has a calculating \"{1}\" with an invalid return_type, should be boolean or string, not \"{2}\""
+msgstr ""
+
+#: src/rougail/convert/object_model.py:474
 msgid "a variable \"{0}\" is needs in attribute \"{1}\" for \"{2}\" but it's a family"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:488
+#: src/rougail/convert/object_model.py:499
 msgid "variable \"{0}\" has an attribute \"{1}\" calculated with the unknown variable \"{2}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:540
+#: src/rougail/convert/object_model.py:551
 msgid "the variable \"{0}\" has an invalid \"{1}\" the variable \"{2}\" is in a sub dynamic option"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:549
+#: src/rougail/convert/object_model.py:560
 msgid "the leader \"{0}\" has an invalid \"{1}\" the follower \"{2}\" is a multi"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:591
+#: src/rougail/convert/object_model.py:602
 msgid "the variable \"{0}\" has an invalid attribute \"{1}\", the variable \"{2}\" must not be multi"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:605
+#: src/rougail/convert/object_model.py:616
 msgid "the variable \"{0}\" has an invalid attribute \"{1}\", the variable must not be a multi or the variable \"{2}\" must be multi"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:619
+#: src/rougail/convert/object_model.py:630
 msgid "the variable \"{0}\" has an invalid attribute \"{1}\", the variable must be a multi or the variable \"{2}\" must not be multi"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:633
+#: src/rougail/convert/object_model.py:644
 msgid "the variable \"{0}\" has an invalid attribute \"{1}\", the variable \"{2}\" is multi but is inside a list"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:655
+#: src/rougail/convert/object_model.py:666
 msgid "the variable \"{0}\" is waiting for a list as \"{1}\" but the attribute \"default\" is not a list (\"{2}\")"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:657
+#: src/rougail/convert/object_model.py:668
 msgid "the variable \"{0}\" is not waiting for a list as \"{1}\" but the attribute \"default\" is a list (\"{2}\")"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:673
+#: src/rougail/convert/object_model.py:684
 msgid "\"{0}\" attribut shall not have an \"optional\" attribute without the \"default\" attribute for variable \"{1}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:697
+#: src/rougail/convert/object_model.py:708
 msgid "variable \"{0}\" has a default value calculated with \"{1}\" which has incompatible type"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:740
+#: src/rougail/convert/object_model.py:751
 msgid "the variable \"{0}\" is waiting for a boolean as \"{1}\" but the attribute \"default\" is not a boolean (\"{2}\")"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:760
+#: src/rougail/convert/object_model.py:771
 msgid "\"when\" is not allowed in format version 1.0 for attribute \"{0}\" for variable \"{1}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:765
+#: src/rougail/convert/object_model.py:776
 msgid "the variable \"{0}\" has an invalid attribute \"{1}\", \"when\" and \"when_not\" cannot set together"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:773
+#: src/rougail/convert/object_model.py:784
 msgid "\"when_not\" is not allowed in format version 1.0 for attribute \"{0}\" for variable \"{1}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:829
+#: src/rougail/convert/object_model.py:840
 msgid "cannot find variable \"{0}\" for the information \"{1}\" when calculating \"{2}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:834
+#: src/rougail/convert/object_model.py:845
 msgid "identifier not allowed for the information \"{0}\" when calculating \"{1}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:886
+#: src/rougail/convert/object_model.py:897
 msgid "\"when\" is not allowed in format version 1.0 for attribute \"{0}\""
 msgstr ""
 
-#: src/rougail/convert/object_model.py:892
-#: src/rougail/convert/object_model.py:902
+#: src/rougail/convert/object_model.py:903
+#: src/rougail/convert/object_model.py:913
 msgid "the identifier has an invalid attribute \"{0}\", \"when\" and \"when_not\" cannot set together"
 msgstr ""
 
-#: src/rougail/convert/object_model.py:928
+#: src/rougail/convert/object_model.py:939
 msgid "the variable \"{0}\" is not a follower, so cannot have index type for \"{1}\""
 msgstr ""
 
-#: src/rougail/convert/path.py:207
+#: src/rougail/convert/path.py:211
 msgid "A variable or a family located in the \"{0}\" namespace shall not be used in the \"{1}\" namespace"
 msgstr ""
 
@@ -314,7 +330,7 @@ msgid "internal error, {0} is not a dynamic variable"
 msgstr ""
 
 #: src/rougail/error.py:61 src/rougail/tiramisu.py:157
-#: src/rougail/user_datas.py:399 src/rougail/user_datas.py:402
+#: src/rougail/user_datas.py:392 src/rougail/user_datas.py:395
 msgid "{0} in {1}"
 msgstr ""
 
@@ -326,7 +342,7 @@ msgstr ""
 msgid "conflict alternative_name \"{0}\": \"{1}\" and \"{2}\""
 msgstr ""
 
-#: src/rougail/structural_directory/__init__.py:127
+#: src/rougail/structural_directory/__init__.py:129
 msgid "duplicate structural file name {0}"
 msgstr ""
 
@@ -343,14 +359,18 @@ msgid "Main namespace name"
 msgstr ""
 
 #: src/rougail/structural_directory/config.py:69
-msgid "Extra namespaces"
+msgid "Namespaces are isolated"
 msgstr ""
 
 #: src/rougail/structural_directory/config.py:78
+msgid "Extra namespaces"
+msgstr ""
+
+#: src/rougail/structural_directory/config.py:87
 msgid "Extra namespace name"
 msgstr ""
 
-#: src/rougail/structural_directory/config.py:84
+#: src/rougail/structural_directory/config.py:93
 msgid "Directories where extra structural files are placed"
 msgstr ""
 
@@ -362,55 +382,55 @@ msgstr ""
 msgid "cannot calculating \"{0}\" attribute for variable \"{1}\" in {2} with parameters \"{3}\": {4}"
 msgstr ""
 
-#: src/rougail/user_datas.py:141
+#: src/rougail/user_datas.py:135
 msgid "cannot load variable path \"{0}\", the identifier \"{1}\" is not valid in {2}"
 msgstr ""
 
-#: src/rougail/user_datas.py:227
+#: src/rougail/user_datas.py:218
 msgid "the variable \"{0}\" contains secrets and should not be defined in {1}"
 msgstr ""
 
-#: src/rougail/user_datas.py:265
+#: src/rougail/user_datas.py:257
 msgid "loaded from {0}"
 msgstr ""
 
-#: src/rougail/user_datas.py:304
+#: src/rougail/user_datas.py:297
 msgid "cannot set the value \"{0}\" to the family {1}, it will be ignored when loading from {2}"
 msgstr ""
 
-#: src/rougail/user_datas.py:316
+#: src/rougail/user_datas.py:309
 msgid "variable or family \"{0}\" does not exist, it will be ignored when loading from {1}"
 msgstr ""
 
-#: src/rougail/user_datas.py:322
+#: src/rougail/user_datas.py:315
 msgid "\"{0}\" is the name of a dynamic family, it will be ignored when loading from {1}"
 msgstr ""
 
-#: src/rougail/user_datas.py:328
+#: src/rougail/user_datas.py:321
 msgid "{0} loaded from {1}"
 msgstr ""
 
-#: src/rougail/user_datas.py:356
+#: src/rougail/user_datas.py:349
 msgid "variable {0} at index \"{1}\" is {2}, it will be ignored when loading from {3}"
 msgstr ""
 
-#: src/rougail/user_datas.py:367
+#: src/rougail/user_datas.py:360
 msgid "family {0} is {1}, {2} at index \"{3}\" will be ignored when loading from {4}"
 msgstr ""
 
-#: src/rougail/user_datas.py:380
+#: src/rougail/user_datas.py:373
 msgid "variable {0} is {1}, it will be ignored when loading from {2}"
 msgstr ""
 
-#: src/rougail/user_datas.py:388
+#: src/rougail/user_datas.py:381
 msgid "family {0} is {1}, {2} will be ignored when loading from {3}"
 msgstr ""
 
-#: src/rougail/user_datas.py:408
+#: src/rougail/user_datas.py:401
 msgid "the value \"{0}\" is an invalid {1} for {2} at index \"{3}\", {4}, it will be ignored when loading from {5}"
 msgstr ""
 
-#: src/rougail/user_datas.py:422
+#: src/rougail/user_datas.py:415
 msgid "the value \"{0}\" is an invalid {1} for {2}, {3}, it will be ignored when loading from {4}"
 msgstr ""
 
diff --git a/src/rougail/annotator/property.py b/src/rougail/annotator/property.py
index ce2cc955e..5b5e7cfb3 100644
--- a/src/rougail/annotator/property.py
+++ b/src/rougail/annotator/property.py
@@ -166,7 +166,7 @@ class Annotator(Walk):
             raise DictConsistencyError(msg, 82, xmlfiles)
         if tag in PROPERTIES_MAKE_SENSE:
             msg = _(
-                'invalid tag name "{0}" should not be name of an available proprerties'
+                'invalid tag name "{0}" should not be name of an available properties'
             ).format(tag)
             raise DictConsistencyError(msg, 82, xmlfiles)
 
diff --git a/src/rougail/locale/fr/LC_MESSAGES/rougail.mo b/src/rougail/locale/fr/LC_MESSAGES/rougail.mo
index 398c60062..f49ad698f 100644
Binary files a/src/rougail/locale/fr/LC_MESSAGES/rougail.mo and b/src/rougail/locale/fr/LC_MESSAGES/rougail.mo differ