go-playground__universal-translator/README.md

universal-translator

Universal Translator is an i18n Translator for Go/Golang using CLDR data + pluralization rules

Why another i18n library?

Because none of the plural rules seem to be correct out there, including the previous implimentation of this package, so I took it upon myself to create locales for everyone to use; this package is a thin wrapper around locales in order to store and translate text for use in your applications.

Features

• Rules generated from the latest CLDR data, v29
• Contains Cardinal, Ordinal and Range Plural Rules
• Contains Month, Weekday and Timezone translations built in
• Contains Date & Time formatting functions
• Contains Number, Currency, Accounting and Percent formatting functions
• Supports the "Gregorian" calendar only ( my time isn't unlimited, had to draw the line somewhere )
• Support loading translations from files
• Exporting translations to file, mainly for getting them professionally translated
• Code Generation for translation files -> Go code.. i.e. after it has been professionally translated
• Tests for all languages, I need help with this, please see here

Installation

Use go get

go get github.com/go-playground/universal-translator

Usage

package main

import (
	"fmt"

	"github.com/go-playground/locales"
	"github.com/go-playground/universal-translator"
)

// only one instance as translators within are shared + goroutine safe
var universalTraslator *ut.UniversalTranslator

func main() {

	// NOTE: this example is omitting allot of error checking for brevity

	universalTraslator, _ = ut.New("en", "en", "en_CA", "nl", "fr")

	en := universalTraslator.GetTranslator("en")

	// generally used after parsing an http 'Accept-Language' header
	// and this will try to find a matching locale you support or
	// fallback locale.
	// en, _ := ut.FindTranslator([]string{"en", "en_CA", "nl"})

	// this will help
	fmt.Println("Cardinal Plural Rules:", en.PluralsCardinal())
	fmt.Println("Ordinal Plural Rules:", en.PluralsOrdinal())
	fmt.Println("Range Plural Rules:", en.PluralsRange())

	// add basic language only translations
	en.Add("welcome", "Welcome {0} to our test")

	// add language translations dependant on cardinal plural rules
	en.AddCardinal("days", "You have {0} day left to register", locales.PluralRuleOne)
	en.AddCardinal("days", "You have {0} days left to register", locales.PluralRuleOther)

	// add language translations dependant on ordinal plural rules
	en.AddOrdinal("day-of-month", "{0}st", locales.PluralRuleOne)
	en.AddOrdinal("day-of-month", "{0}nd", locales.PluralRuleTwo)
	en.AddOrdinal("day-of-month", "{0}rd", locales.PluralRuleFew)
	en.AddOrdinal("day-of-month", "{0}th", locales.PluralRuleOther)

	// add language translations dependant on range plural rules
	// NOTE: only one plural rule for range in 'en' locale
	en.AddRange("between", "It's {0}-{1} days away", locales.PluralRuleOther)

	// now lets use the translations we just added, in the same order we added them

	fmt.Println(en.T("welcome", "Joeybloggs"))

	fmt.Println(en.C("days", 1, 0, string(en.FmtNumber(1, 0)))) // you'd normally have variables defined for 1 and 0
	fmt.Println(en.C("days", 2, 0, string(en.FmtNumber(2, 0))))
	fmt.Println(en.C("days", 10456.25, 2, string(en.FmtNumber(10456.25, 2))))

	fmt.Println(en.O("day-of-month", 1, 0, string(en.FmtNumber(1, 0))))
	fmt.Println(en.O("day-of-month", 2, 0, string(en.FmtNumber(2, 0))))
	fmt.Println(en.O("day-of-month", 3, 0, string(en.FmtNumber(3, 0))))
	fmt.Println(en.O("day-of-month", 4, 0, string(en.FmtNumber(4, 0))))
	fmt.Println(en.O("day-of-month", 10456.25, 0, string(en.FmtNumber(10456.25, 0))))

	fmt.Println(en.R("between", 0, 0, 1, 0, string(en.FmtNumber(0, 0)), string(en.FmtNumber(1, 0))))
	fmt.Println(en.R("between", 1, 0, 2, 0, string(en.FmtNumber(1, 0)), string(en.FmtNumber(2, 0))))
	fmt.Println(en.R("between", 1, 0, 100, 0, string(en.FmtNumber(1, 0)), string(en.FmtNumber(100, 0))))
}

Help With Tests

To anyone interesting in helping or contributing, I sure could use some help creating tests for each language. Please see issue here for details.