Fixed 2016-02-03
It should be written as
{% set pages = site.query('./blog', alt=alt).all() %}
But I've written as below
{% set pages = site.query('./blog').all() %}
Still I couldn't find how to refer alternative language (english) blog title from top page.
I written code as below. It listing up blog titles but it is only refer primary language title even if referred from english page.
{% set pages = site.query('./techblog').all() %}
{% for page in pages[0:5] %}
<li>
{{ page.title }}
</li>
{% endif %}
{% endfor %}