Major Description
The locale feature of VelocityResponseWriter is currently used to set the locale for the $resource tool. However, there are some other tools that leverage the locale setting that are falling back to the default system locale.
For example, $number.format should allow $number.format("integer",50000) to render the number in the v.locale specified locale but always uses the default system locale.
A workaround for number formatting is to use the $resource.locale setting like this: $number.format("integer",50000,$resource.locale)