> ## Documentation Index
> Fetch the complete documentation index at: https://docs.jingjaiops.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Language: English & Thai

> How JingjaiOps handles bilingual content for staff and customers.

JingjaiOps is fully bilingual. Every interface, PDF, email, and portal page can render in English or Thai. The language a person sees depends on their setting, not yours.

## EN / TH toggle for staff

The language toggle lives in the top bar next to your avatar.

* **EN** — English interface, English-first PDFs.
* **TH** — Thai interface, Thai-first PDFs.

Your preference is saved to your user profile and follows you to any device.

## Setting a customer's preferred language

Each customer has a **Preferred Language** field on their profile. Set it to **TH** for Thai customers and **EN** for English-speaking customers.

This setting controls:

| Where                  | Effect                                                       |
| ---------------------- | ------------------------------------------------------------ |
| Quote PDFs             | Bilingual layout with the preferred language listed first    |
| Invoice PDFs           | Bilingual layout with the preferred language listed first    |
| Email subject and body | Sent in the customer's preferred language                    |
| Client portal          | Defaults to the customer's preferred language on first visit |
| Receipt PDFs           | Bilingual with preferred language first                      |

## How bilingual PDFs work

Quote and invoice PDFs always show **both languages** side by side. The customer's preferred language appears first; the other language appears beneath each line for reference.

This means a Thai customer sees Thai prominently with English as backup, and an English customer sees the reverse. There is no version where one language is hidden — every contract is fully understandable in both languages, which matches the spirit of the Thailand Electronic Transactions Act.

## Portal language

The client portal has its own language toggle in the top right. The first time a client opens the portal, the language matches the **Preferred Language** on their customer record. They can switch at any time and the choice sticks for that device.

<Tip>
  Item names from inventory follow your inventory language settings. If an inventory item has a Thai name set in **Settings → Categories**, that name appears for Thai customers and the English name appears for English customers.
</Tip>

## Thai-specific behavior

Some things only behave correctly in Thai mode:

* **Thai Tax Invoice** (ใบกำกับภาษี) PDFs use Thai header text and Buddhist calendar dates.
* **PromptPay QR codes** in the portal display in Thai for Thai-language clients.
* **Thai address formatting** uses subdistrict / district / province order on PDFs.
* **Thai number formatting** uses commas as thousands separators (same as EN) but currency renders as `฿` rather than `THB`.