csv_localizations

A minimal CSV localization package for Flutter.

Store translations for multiple languages in a single CSV file. One language per column. One translation per row.

Usage

See example.

Install

Add to your pubspec.yaml

dependencies:
  csv_localizations:

Add a single CSV asset file

Add a single CSV file as an asset and describe it in your pubspec.yaml

flutter:
  assets:
    - assets/translations.csv

Example CSV file

key,en,nb,en-GB,en-US
Hi,Hi,Hei,Hi GB,Hi US
my_img,assets/en.png,assets/nb.png,assets/en.png,assets/en.png
Multiline,"This is a
  multiline string","Denne teksten går over
  flere linjer","This is a
  multiline string","This is a
  multiline string"

Tip: keys can point to local assets like images etc.

Format

key	en-GB	en	nb
Hi	Hi	Hi	Hei
Bike	Bike	Bike	Sykkel
Dog	Dog	Dog	Hund

First row lists supported language/country codes.

First column are keys for localized values.

You can wrap multiline strings in quotation marks.

API

Translate strings using:

CsvLocalizations.instance.string('Hi')

Or add a String extension:

Let's keep the API simple and not pollute the String API

extension LocalizedString on String {
  String tr(BuildContext context) => CsvLocalizations.instance.string(this);
}

We use \n as the default eol (end-of-line) char, but you can set this via CsvLocalizations.instance.eol.

Check if the translation file is loaded using CsvLocalizations.instance.loaded. Only necessary if called before initializing the global localizationDelegates.

MaterialApp

Add CsvLocalizationsDelegate to MaterialApp and set supportedLocales using language codes.

MaterialApp(
  localizationsDelegates: [
    ... // global delegates
    CsvLocalizationsDelegate('assets/translations.csv'),
  ],
  supportedLocales: [
    Locale('en', 'GB'),
    Locale('en', 'US'),
    Locale('en'),
    Locale('nb'),
  ],
}

Note on iOS

Add supported languages to ios/Runner/Info.plist as described here.

Example:

<key>CFBundleLocalizations</key>
<array>
	<string>en</string>
	<string>en-US</string>
	<string>en-GB</string>
	<string>nb</string>
</array>