Internalisation of your Grails based application with i18n-asset-pipeline plugin

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What I will present below about i18n-asset-pipeline grails plugin which is doing the same job as as such. You probably find a few implementations of on grails plugin portal. I’m not entirely sure you will be happy with my suggestion. However, I would say that using this plugin will help us minimise the effort to maintain and call tag lib g:message in both grails views and external javascript files.

If you feel confident to play with i18n-asset-pipeline, please take a closer look at its documentation. Below are the summarised baby steps I have been doing with grails 2.5.6.

Step 1: Declare the plugin in BuildConfig.groovy

plugins {
   runtime 'org.grails.plugins:i18n-asset-pipeline:1.0.6'

Step 2: Define your messages properties in the appropriate files

In Resource Bundle messages under grails-app/i18n directory, you add your languages of interest files, such as,, etc. To demonstrate how this works, I have welcome.message just display a welcome message on the index page in these files messages_{fr,es,vi}.properties.

Step 3: Define i18n files in assets/javascripts/i18n directory

After starting the application first, you will see this directory. Creating the same set of files, i.e.,messages.i18nmessages_{es,fr,vi}.i18n. Inside these files, we just put the properties that were added in messages_{es,fr,vi}.properties files or the properties you want to display in only specific languages.

Step 4: Set the default language (optional)

Leaving the following snippet in grails-app/conf/spring/resources.groovy file

beans = {
   localeResolver(org.springframework.web.servlet.i18n.SessionLocaleResolver) {
      defaultLocale = new Locale("fr", "FR")

Step 5: How to use i18n plugin

In views, we can load i18n language default setting and display message properties something along those lines.

<%@ page contentType="text/html;charset=UTF-8" %>
    <title>Demo | BioModels</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta name="layout" content="main"/>

    <g:set var="locale" value="${session.'org.springframework.web.servlet.i18n.SessionLocaleResolver.LOCALE'}"/>
    <asset:i18n locale="${locale}"/>

<h2><g:message code="welcome.message"/> </h2>

Step 6: Testing

Open a tab in your web browser, retrieving your page, http://localhost:8900/i18ndemo/demo/, for instance, it will render the content of welcome.message property in the default language which was set up in resources.groovy. If you want to switch to other languages straightaway, type ?lang=es after the previous URL. That looks like http://localhost:8900/i18ndemo/demo/?lang=es

After getting through those steps, I believe you will obtain your need.

The sample project has been also pushed to bitbucket found here.

I hope this answer would help you solve your problem.

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