While ranging through .Page.AllTranslations or .Page.Translations, it would be useful to know if the current language is the defaultContentLanguage. Those methods return the page collection sorted by language weight; the first may or may not be the default.

This would be a convenience method so that you could do this:

{{ range .AllTranslations }}
  {{ if .Language.IsDefault }}
     ...
  {{ end }}
{{ end }}

instead of this:

{{ range .AllTranslations }}
  {{ if eq .Site .Sites.Default }}
     ...
  {{ end }}
{{ end }}

The first is, at least to me, easier to understand

If we do something like this, the API may depend on pending dimensions work.