Enthuware

In the <f:view> tag of the Facelet page you cannot configure the different supported locales, just indicate to use the default one, is that so?

Yes geometry dash meltdown, that's correct. The <f:view> tag in a facelet page cannot configure supported locales; it only uses the current or default locale. To set supported locales, you need to define them in the faces-config.xml file, like this:
<application>
<locale-config>
<default-locale>en</default-locale>
<supported-locale>es</supported-locale>
</locale-config>
</application>
The <f:view> can use the default or current locale but doesn't configure them directly.