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Although the basics of the i18n mechanism are the same for every part of the ecosystem, the packaging differs depending on what you are developing:

  • Translations for the Sonar SonarQube Platform: making the Sonar SonarQube Platform available in a new language requires to develop and publish a new Language Pack plugin.
    • By default Sonar embeds default SonarQubeembeds the English Pack.
    • All other Language Pack plugins (like the French Pack plugin) are hosted in the Plugins Forge, are maintained by the community and are available through Update Center (category "Localization").
  • Translations for the Sonar the SonarQube Community Plugins: open-source plugins of the Sonar the SonarQube Community (hosted in the Plugins Forge) must embed only the bundles for the default locale. Translations will be done in the Language Pack plugins.

  • Translations for other Plugins: closed-source/commercial/independant plugins must embed the bundles for the default locale and the translations for every language they want to support.
Tip
titleTo sum up
  • Sonar SonarQube Platform and Sonar and SonarQube Community Plugins rely on Language Pack plugins to get translations
  • Other independant Sonar SonarQube plugins embed by themselves all the translations they need

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  • These are regular properties files with key/value pairs where you will put most translations
  • These files must be stored in the package "org.sonar.l10n" package (usually in the directory src/main/resources/org/sonar/l10n directory)
  • The name of these files must respect the convention "<key of the plugin to translate>_<language>.properties", for example "technicaldebt_fr.properties" or "core_fr.properties". See sonar-packaging-maven-plugin for details on plugin key derivation.

  • Messages accept arguments. Such entries would look like:

    No Format
    myplugin.foo=This is a message with 2 params: the first "{0}" and the second "{1}".

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  • They are used for rule descriptions, which might be long and need HTML tags
  • These files must be stored in the package "org.sonar.l10n.<plugin key>_<language>" package.
    • Starting with Sonar 3SonarQube3.0, the files should be stored in the package "org.sonar.l10n.<key of the plugin to translate>_<language>.rules.<repository key>" package (backward compatibility is ensured for l10n plugins which use the former location)
  • The name of these files must be the key of the rule they translate
  • Example: the French description of the Squid Architectural Constraint rule is "src/main/resources/org/sonar/l10n/squidjava_fr/ArchitecturalConstraint.html"
    • Or, starting with Sonar 3SonarQube3.0: "src/main/resources/org/sonar/l10n/squidjava_fr/rules/squid/ArchitecturalConstraint.html" (as "squidjava" is the plugin key and "squid" the repository key)
Warning
titleUTF-8 encoding

In the Java API, properties files are supposed to be encoded in ISO-8859 charset. Without good tooling, this can be quite annoying to write translation for languages that do not fit in this charset.
This is why we decided to encode the properties files in UTF-8, and let Maven turn them into ASCII at build time thanks to native2ascii-maven-plugin (check the French plugin pom.xml). This makes the process of writing translations with a standard editor far easier.
HTML files must also be encoded in UTF-8.

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Key

Description

Example

metric.<key>.name

Metric name

metric.ncloc.name=Lines of code

metric.<key>.description

Metric description

metric.ncloc.description=Non Commenting Lines of Code

notification.channel.<channel key>

Name of notification channel

notification.channel.EmailNotificationChannel=Email

notification.dispatcher.<dispatcher key>

Subscription to notification channel

notification.dispatcher.ChangesInReviewAssignedToMeOrCreatedByMe=Changes in review assigned to me or created by me

rule.<repository>.<key>.name

Rule name

rule.pmd.StringInstantiation.name=String Instantiation

rule.<repository>.<key>.param.<param key>

Description of rule parameter

rule.pmd.VariableNamingConventions.param.memberSuffix=Suffix for member variables

dashboard.<key>.nameDashboard name, since 2.14.dashboard.Hotstpots.name=Point Chauds

qualifier.<key>

qualifiers.<key>

Qualifier name, since 2.13.

qualifier.TRK=Project

qualifiers.TRK=Projects

widget.<key>.name

Widget name

widget.alerts.name=Alerts

widget.<key>.description

Widget description

widget.alerts.description=Display project alerts

widget.<key>.property.<property key>.name
Name of widget property
widget.hotspot_most_violated_rules.property.defaultSeverity.name=Default severity
widget.<key>.property.<property key>.desc
Description of widget property
widget.hotspot_most_violated_rules.property.defaultSeverity.desc=If selected, 
severity used to initialize the dropdown list of widget
widget.<key>.property.<property>.option.<option>.name
Name of item of dropdown list 

widget.<key>.*

Any other widget message

widget.alerts.tooltip=Threshold is raised

<page key>.page

Page names shown in the left sidebar

cloud.page=Cloud

<page key>.*

Any other keys used in a page

cloud.size=Size

property.category.*<category key>

Category name of properties, since 2.11

property.category.General=Général

property.category.<category key>.description
Short description of category of properties, since 3.6property.category.General.description=General properties of SonarQube
property.category.<category key>.<subcategory key>
Subcategory name of properties, since 3.6property.category.exclusions.global=Global exclusions
property.category.<category key>.<subcategory key>.descriptionShort description of subcategory of properties, since 3.6property.category.exclusions.global.description=Configuration of global exclusions

property.<key>.name

Property name, since 2.11

property.sonar.sourceEncoding.name=Source encoding

property.<key>.description

Property description, since 2.11

property.sonar.sourceEncoding.description=Source encoding

<plugin key>.*

Any other keys used by plugin

 

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A Language Pack defines bundles for the Sonar Platform SonarQubePlatform and for the Sonar SonarQube Community plugins.

Creating a new Language Pack

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This part applies if you are developing a commercial / closed-source plugin, or an open-source plugin that is not part of the Sonar SonarSonarQube Community Plugins.

Such plugins must embed their own bundles. Bundles must be added to src/main/resources with the following convention names :

  • Standard messages : org/sonar/l10n/<plugin key>_<language>.properties
  • Rule descriptions :
    • Up to Sonar 3SonarSonarQube3.0: org/sonar/l10n/<plugin key>_<language>/*.html
    • Since Sonar SonarSonarQube 3.0: org/sonar/l10n/<plugin key>_<language>/rules/<repository key>/*.html

The default bundle is mandatory, and must be the English translation. For example the plugin with key "mysonarplugin" must define the following files in order to enable the French translation:

  • org/sonar/l10n/mysonarplugin.properties
  • org/sonar/l10n/mysonarplugin_fr.properties