1 files changed, 16 insertions, 1 deletions
diff --git a/addons/account/wizard/account_invoice_send.py b/addons/account/wizard/account_invoice_send.py
index 812ed0ec297..18701888538 100644
--- a/addons/account/wizard/account_invoice_send.py
+++ b/addons/account/wizard/account_invoice_send.py
@@ -86,7 +86,22 @@ class AccountInvoiceSend(models.TransientModel):
     @api.multi
     def send_and_print_action(self):
         self.ensure_one()
-        self._send_email()
+        # Send the mails in the correct language by splitting the ids per lang.
+        # This should ideally be fixed in mail_compose_message, so when a fix is made there this whole commit should be reverted.
+        # basically self.body (which could be manually edited) extracts self.template_id,
+        # which is then not translated for each customer.
+        if self.composition_mode == 'mass_mail' and self.template_id:
+            active_ids = self.env.context.get('active_ids', self.res_id)
+            active_records = self.env[self.model].browse(active_ids)
+            langs = active_records.mapped('partner_id.lang')
+            default_lang = self.env.context.get('lang', 'en_US')
+            for lang in (set(langs) or [default_lang]):
+                active_ids_lang = active_records.filtered(lambda r: r.partner_id.lang == lang).ids
+                self_lang = self.with_context(active_ids=active_ids_lang, lang=lang)
+                self_lang.onchange_template_id()
+                self_lang._send_email()
+        else:
+            self._send_email()
         if self.is_print:
             return self._print_document()
         return {'type': 'ir.actions.act_window_close'}