I did new language fail from copy of jdtestimonials_english.php and translated all strings. Right now I have very good working environment in Estonian language (I can send it for you if you think that it might be useful for others).
I also translated month names.
Ex. var $months = array("jaanuar"=>1, "veebruar"=>2, "märts"=>3, "aprill"=>4, "mai"=>5, "juuni"=>6, "juuli"=>7, "august"=>8, "september"=>9, "oktoober"=>10, "november"=>11, "detsember"=>12);
It's working very well in backend when I take open some testimonials for editing. Question is why it's not working on frontside? There it presents date as 20 January 2009 but it must be 20 jaanuar 2009. Any idea? Thanks