The latest improvements and language pairs added to the Google Translation Engine have been included in the simple WordPress Translation Plugin downloadable from this personal blog.
It now includes links to automatic translations from and into all language pairs offered by Google Translation Engine, apart from other language pairs (from individual languages, like English) into other online machine translators, viz Tranexp.
Available language pairs now include (new pairs in bold): English, Albanian, Arabic, Bulgarian, Catalan, Chinese (Simplified and Traditional), Croatian, Czech, Danish, Dutch, Estonian, Filipino, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Icelandic*, Indonesian, Italian, Japanese, Korean, Latvian, Lithuanian, Maltese, Norwegian, Persian*, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, Ukrainian, Vietnamese, Welsh*.
*These languages are only offered as languages to be translated into from the English version.