I started using K2, and I cant find which is the variable that I have to translate in order for the "All" items (tag) to be translated into Greek.
For the rest of the tags, I used joomfish for joomla 2.5 and everything is ok.
Where is that variable, if it is. I found a variable K2_ALL and I translated but nothing happend.
I also installed the last greek language files.

Hi,

Did you find the solution ? I've the same problem to translate into french.

Yes!
I found one by myself...

you go to templates/<your template>/html/com_k2/templates/portfolio/category.php

in line 42:
<a href="#" id="all" class="active_sort">All</a>
you change the second All with your language
i.e. <a href="#" id="all" class="active_sort">Όλα</a>

In my case I was using the portfolio k2 template, so if you use another one, then you have to go to..
templates/<your template>/html/com_k2/templates/<your k2 template>/category.php

I hope to help you too.

Thanks