[12.0][ADD] base_default_lang_translate

base_default_lang_translate/models/res_lang.py

@@ -0,0 +1,16 @@
+# Copyright 2021 Le Filament (https://le-filament.com)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+
+from odoo import _, api, fields, models
+from odoo.exceptions import ValidationError
+
+
+class ResLang(models.Model):
+    _inherit = "res.lang"
+
+    is_default_lang = fields.Boolean("Default Language", default=False)
+
+    @api.constrains("is_default_lang")
+    def _check_default(self):
+        if self.search_count([("is_default_lang", "=", True)]) > 1:
+            raise ValidationError(_("Another language is already set by default"))