Hello,
When I used alfresco4.2.f , display locale depends on browser's default locale.
So if japanese user accessed our alfresco, login message was automatically displayed in japanese.
Now on alfresco5.0.b, it does not work.
4.2.f had language evaluator which included in
tomcat/webapps/alfresco/WEB-INF/classes/alfresco/web-client-config.xml
but it disappeared from 5.0.b.
This function is moved or deleted ?
12/11/2014 ==
I resolved my own problem.
I changed default locale of OS from ja_JP.UTF-8 to en_US and restart Alfresco,
then both en and ja locale setting of browser affected correctly.