Translating the months in the archive view
Well, if you have tried all those options, what if you try to replace the respective values from a common view template, using for example, preg_replace() PHP functions, to change this values?

for example: Here is the part of views-view-unformatted.tpl.php when each result is printed:

&lt;?php foreach ($rows as $id =&gt; $row): ?&gt;
  &lt;div class="&lt;?php print $classes[$id]; ?&gt;"&gt;   
    &lt;?php print $row; ?&gt;
  &lt;/div&gt;
&lt;?php endforeach; ?&gt;


you can use a custom views-view-unformatted.tpl.php specific to your view, and use preg_replace() to detect and replace any specific term in $row, according terms that you want. for example

&lt;?php
$string = $row;
$patterns = array();
$patterns[0] = '/jan/';
$patterns[1] = '/feb/';
$patterns[2] = '/mar/';
$replacements = array();
$replacements[2] = 'othermar';
$replacements[1] = 'otherfeb';
$replacements[0] = 'otherjan';
echo preg_replace($patterns, $replacements, $string);
?&gt;


see preg_replace() to get more details. I guess that you can use Devel module to see impact of this way against your site performance.

I hope information be useful.