[keycloak-dev] Locale lookup issue

[Iilei • Jochen Preusche]

Hello all,

A little background information:

In Keycloak 3.4.3.Final the following behaviour seems like a bug to me:

* Use a theme with a country-specific locale, for example fr-FR and a default locale `english` 
* Use Firefox on Ubuntu, drop all language preferences in its settings and just add `french` (no country specified)
* request the login page
* the theme will be rendered in english

Acknowledging the RFC-4647 (1) Section 3.4; "Best Current Practice - Matching of Language Tags - Types of Matching - Lookup" I would expect basic matching to be applied so that the french language is chosen.

The topic is discussed cotroversely in the original Pull Request (2). Therefor I have been asked to move a discussion from the Pull-Request to this mailing list.

For more Info, see also the related issue (3)

Thank you for your consideration.

Kind regards, 
Jochen Preusche


(1) https://www.ietf.org/rfc/rfc4647.txt

(2) https://github.com/keycloak/keycloak/pull/4958

(3) https://issues.jboss.org/browse/KEYCLOAK-6461