[FIX] odoo: Copy a record in other language than US

When copying a record in an other language L than US, first a translation
was created for L by the create called in the copy function and afterwards,
a second translation was created by the function copy_translations

So there were two duplicated translations for L instead of one.

opw:706865

odoo/models.py

@@ -4379,7 +4379,8 @@ class BaseModel(object):
         """
         self.ensure_one()
         vals = self.copy_data(default)[0]
-        new = self.create(vals)
+        # To avoid to create a translation in the lang of the user, copy_translation will do it
+        new = self.with_context(lang=None).create(vals)
         self.copy_translations(new)
         return new