Latest 2.3.4
License MIT
Platforms ios 8.0, requires ARC

Kunstmaan I18n-Swift


  • [x] Make use of the default Localizable.strings file.
  • [x] Change the language of your app without changing the device language.
  • [x] Make your images Localizable.
  • [x] Interface builder support, you can configure your localization keys directly in the Interface Builder. If no localization key is found it will fallback to the original properties for the labels to show.

Example project can be found here i18n-swift-example


The preferred installation method of installation is using CocoaPods, this way you can configure the @IBDesignable and @IBInspectable properties in the Interface Builder. Apparently when using a standard IOS Framework these properties don’t appear in the Interface Builder.


CocoaPods is a dependency manager for Cocoa projects. You can install it with the following command:

$ gem install cocoapods

To integrate KunstmaanI18nSwift into your Xcode project using CocoaPods, specify it in your Podfile:

source ''
platform :ios, '8.0'

pod 'KunstmaanI18nSwift', '~> 2.0'

Then, run the following command:

$ pod install

Finally add this to your Bridging-Header.h file:

#import <KunstmaanI18nSwift/KunstmaanI18nSwift.h>

Carthage (UNTESTED)

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

$ brew update
$ brew install carthage

To integrate KunstmaanI18nSwift into your Xcode project using Carthage, specify it in your Cartfile:

github "Kunstmaan/i18n-swift" ~> 2.0

Run carthage update to build the framework and drag the built KunstmaanI18nSwift.framework into your Xcode project.


When the i18n module is loaded it will try to configure it self based on the preferred languages configured on the device. If no matching language is found there will be no language configured.

Interface Builder

Following properties of UIViews have localization support inside the Interface Builder (the properties can also be set by code):

  • UIButton
    • default title: i18nDefaultTitleKey
    • highlighted title: i18nHighLightedTitleKey
    • selected title: i18nSelectedTitleKey
    • disabled title: i18nDisabledTitleKey
  • UILabel
    • text: i18nTextKey
  • UINavigationItem
    • title: i18nTitleKey
  • UITextField
    • placeholder: i18nPlaceholderKey

Special case:

  • UIImage
    • image: i18nImageBaseName

By providing the baseName of the image, the view will look for the image named "baseName (locale)". It’s possible to override this format by extending the i18n class and overriding:

public func localizedImageNameFor(name: String, lang: String?) -> String 


You can make use of the String extension to quicky translate a key:


Or with extra options:

"your.translation.key".i18nLocalized(defaultValue: String, table: String, arguments: ...)

Or you can use the i18n class, to use this you should import the i18n module on top of your Swift classes where you want to use this:

import KunstmaanI18nSwift

This will make the i18n class available for you and gives you access to the following API:

  • i18n.possibleLanguages This returns an array of languages which are configured for your project (for example: ["en", "nl"])
  • i18n.language This returns a String value of the current configured language (for example: "en")
  • i18n.locale This returns an NSLocale value of the current configured language
  • i18n.hasLanguage Returns a boolean indicating if a current language is configured
  • i18n.setLanguage(lang: String) Set the current language
  • i18n.isCurrentLanguage(lang: String) Returns wheither the given language is the same as the current configured one
  • i18n.clear() Removes any configured language
  • i18n.localizedStringForKey(key: String, defaultValue: String, table: String, arguments: ...) Returns the translated value for this translation key
  • i18n.localizedImageForName(name: String) Returns the localized UIImage for the given name ("baseName (locale)")


For now there is only one event being dispatched and that is when the Language is being changed. You can listen for this event as follows:

NSNotificationCenter.defaultCenter().addObserver(self, selector: "onLanguageChange", name: I18n.Events.OnChange, object: nil)
public func onLanguageChange(notification: NSNotification) {
    if let info = notification.userInfo as? Dictionary<String,String>, lang = info["lang"] {
        let oldLang = info["oldLang"]

        // Do something here

Latest podspec

    "name": "KunstmaanI18nSwift",
    "version": "2.3.4",
    "summary": "Framework for adding basic Localization to your project.",
    "homepage": "",
    "license": {
        "type": "MIT",
        "file": "LICENSE"
    "authors": {
        "Kunstmaan": "[email protected]"
    "social_media_url": "",
    "platforms": {
        "ios": "8.0"
    "requires_arc": true,
    "source": {
        "git": "",
        "tag": "v2.3.4",
        "submodules": true
    "source_files": "KunstmaanI18nSwift/**/*.{h,swift}",
    "pushed_with_swift_version": "3.0"

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