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

# What language is used across Upflow?

> Choose between English (US), English (UK), and French (FR) for your Upflow app interface, and learn how dates, amounts, and tags adapt by language.

Across countries and languages, dates and amounts have different formats. Using the wrong format may confuse your contacts and add friction to the payment process. This is why we offer different languages across the app, depending on the situation.

## Your app language

Selectable in [your Profile](https://app.upflow.io/organization/-/profile/general), it allows you to choose between English (US), English (UK) or French (FR). It will impact all the data you see in the app, excluding the custom tags or the portal.

<img src="https://mintcdn.com/upflow-04dc27cd/8J-Jf3EzWBUuWUtX/images/45487859486993.png?fit=max&auto=format&n=8J-Jf3EzWBUuWUtX&q=85&s=8817ab0d4905dd156ee3b58c7b4d8f7d" alt="" width="640" data-path="images/45487859486993.png" />

## Collection keys/tags language

When you use a [collection tag](/en-us/collection-and-collaboration/workflows-customize-your-collection/collection-tag-inserter) like "Today" or "Carrying invoice due date", we look for the best format for your customer.

Indeed, you can have your app in English (US), but work with customers in the UK who could be confused by the 5/22/2025 date.

Today, we rely on the customer's outstanding invoice currency and the following rules:

**Date format**

| If the customer only has USD outstanding invoices... | ...then we use the American format `MM/DD/YYYY`... | ...if any other currencies, we apply the French format `DD/MM/YYYY` |
| ---------------------------------------------------- | -------------------------------------------------- | ------------------------------------------------------------------- |
|                                                      |                                                    |                                                                     |

**Amount format**

| If the customer only has EUR outstanding invoices... | ... then we use the FR format `3 234,12€`... | ...if any other currencies, we apply the American one `\$3,234.12` |
| ---------------------------------------------------- | -------------------------------------------- | ------------------------------------------------------------------ |
|                                                      |                                              |                                                                    |

## The portal language

On the portal, we use the viewer browser location (`en_US`, `en_GB`, `fr_FR`). If the browser location is not supported, then it falls back to `en_US`.

Any questions? [Contact us](mailto:support@upflow.io)!