# Assets - i18n (internationalisation) properties files

The I18n properties files asset is one of the types of content that can comprise a BRJS application. There is more information about assets on [About Bundlers](bladerunner-about-bundlers.md#assets).

Each i18n file is a standard Java properties file, and contains label values appropriate for a particular locale.

**For example:**

The file **_en_GB.properties_** might contain the following definition for a greeting:

```
novotrader.welcome=Hello
```

Whilst the file **_fr_FR.properties_** would contain:

```
novotrader.welcome=Bonjour
```

The browser will request all labels for a particular locale. In most circumstances, the i18n bundler only loads the properties files appropriate for the requested locale. When a deployable application is being generated however, a separate i18n bundle will be generated for every locale for which properties files exist. The localised labels are sent to the browser as a single JSON map of key/label pairs.

The i18n bundler enforces a namespacing convention, which ensures that someone working in a **blade** cannot accidentally overwrite a label in another blade. An error is reported if a template violates the namespacing convention. The bundler verifies that the label identifier key follows the namespacing convention.

**For example:**

```
novotrader.fx.tile.execute=Execute Trade
```

In this example, the properties file must reside in a blade for which the **app** name is **_novotrader_**; the **bladeset** name is **_fx_**, and the blade is called **_tile_**.