While testing to send an invoice to customer, the invoice template language becomes something other than English, how to fix it ?

Subtotale is a Portuguese language, Rita. Let's go to the Language section to update and choose your preferred language and send your invoices accordingly.

QuickBooks supports a variety of languages (English, Chinese, French, Italian, Spanish, Arabic, Thai, Portuguese, German, Japanese, and Korean). To select the one you're utilizing, follow these steps (only if the language in QuickBooks is English):

1. Go to the Gear icon and select Account and settings.
2. Select the Advanced menu and then go to the Language section.
3. Choose the desired language from the drop-down.
4. Click Save, and then Done when you're ready.

If the language in QuickBooks is converted to Portuguese, here's how to choose your preferred one:

1. Go to the Gear icon and select Conta e definicoes.
2. Select the Avancadas menu and then go to the Idioma section.
3. Choose the desired language (for example, English) from the drop-down.
4. Click Guardar and then Done.

You can also change the language in QuickBooks Online (QBO) using the language settings of your browser. To learn more about this, please see this article: Change language in QuickBooks Online.

Moreover, you can personalise your forms with the new version of invoicing and estimates in QBO. If you need a guide on how to do this, you can check out this article: Customise invoices, estimates, and sales receipts in QuickBooks Online.

Feel free to return here if you have additional questions about your language setup and managing invoices in QBO. We'll be here to help. Keep safe, and have a good one.