last update of joomla and hikashop messed up languages and content

Hi,

When you have issues with translations, the first thing to do is to activate the "debug language" setting of the joomla configuration page and look at the bottom of the pages.
You'll have debug information regarding the language files. It will tell you if Joomla has found errors in them and if so on which line of which file. You can then look at the files at the location pointed out by the debug and you can usually find what the problem is.
Most of the times, the problem comes from copying or editing the translation files, messing in the process the files by adding line returns in the middle of translation texts, which is not allowed by Joomla. This causes Joomla to fail the parsing of the file.