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i18n-nodejs

Internationalization localization package

  • 2.0.0
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i18n-nodejs

I18n module for node, out of frustration with over complicated modules for translation & localization I created this module with simplicity in mind.

Install

npm install i18n-nodejs --save

Usage

var config = {
	"lang": "ar",
	"langFile": "./../../locale.json"//relative path to index.js file of i18n-nodejs module
}
//init internationalization / localization class
var i18n = require('i18n-nodejs')(config.lang, config.langFile);
console.log(i18n.__('Welcome')); // output => 'اهلا'

Languages file

langFile is JSON file have the text that you need to translate as key and the value is object its key is language abbreviation and the value is the translated text.

{
	"Welcome": {
		"ar": "مرحبا",
		"fr": "Bienvenue"
	},
	"Looking for user": {
		"ar": "نبحث الان عن مستخدم اخر"
	},
	"You have disconnected.": {
		"ar": "تم قطع الاتصال."
	},
	"Chat": {
		"ar": "شات"
	}
}

Find the translation

The module will try to find the translation using the language abbreviation if could not find it will return the original text.

variables

If the text has variable that need to be translated you should add the the text like {{name}} and you need to pass the translated value of that variable as second arg into the __() function.

//Language file
{
	"Welcome {{name}}": {
		"ar": "مرحبا {{name}}"
	},
	"eslam": {
		"ar": "اسلام"
	}
}
//index.js file
var config = {
	"lang": "ar",
	"langFile": "./../../locale.json"//relative path to index.js file of i18n-nodejs module
}
//init internationalization / localization class
var i18n = require('i18n-nodejs')(config.lang, config.langFile);
console.log(i18n.__("Welcome {{name}}", {name: "اسلام"}));
// output => 'مرحبا اسلام'

If you do not want to write the tranlation directly in your code (wich you should not do) you should add the value and its translation the langauage file and use it like that

console.log(i18n.__("Welcome {{name}}", {name: i18n.__("eslam")}));
// output => 'مرحبا اسلام'

Version 2.0.0

Pluralization

Starting form version 2.0.0 we now support pluralization, First let us describe the problem let say we want to display "Hi Eslam, you have 555 points", but if you want to display that text in arabic the word "points" will have 5 different possibilities to be rendered in as it is the rule in Arabic language in case of plural each of them depend on the number before the word.

So instesd of writing it as

//this is worng
"Hi {{name}}, you have {{points_count}} points"

You should pass the count to the variable as {{var||var_count}}

i18n.__(
    "Hi {{name}}, you have {{points_count}} {{points||points_count}}", {   
        name: i18n.__("eslam"), 
        points_count: 555
    }

As you see we passed the variable name aslo we passed the points_count in two places

  • where we want it to be displayed
  • where we need to handle the pluralization after ||

The translation file should be

{
    "Hello {{name}}, you have {{points_count}} {{points||points_count}}": {
		"ar":  "مرحبا {{name}}, لديك {{points_count}} {{points||points_count}}"
	},
	"eslam": {
		"ar": "اسلام"
	},
	"points": {
		"ar": {
			"0": "نقاط",
			"1": "نقطة",
			"2": "نقطتين",
			"3": "نقاط",
			"4": "نقطة",
			"5": "نقطة"
		}
	}
}

You can find all the rules in this localization guide

There is a note also as you can see we did not submit the points variable in the values object as second param for __(string, values object) because now the module is smarter and will look first for the translation in the values param then if it is not there will look for it in the file set in the constructor

Summary of updates

-Version 2.0.0 support pluralization, remove the dependency to other packages to make it even simpler and light for your app and if you passed any values for any variable in the second param it will overwrite the original value in the translation file.

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Package last updated on 23 Jan 2016

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