Marco, there is nothing installed as a plugin in my vbulletin, yes they were installed previously but i disable/uninstalled them...
I have updated code in the files according to my requirements, if i upload fresh copy i have to move through so many files
isn't there any other solution? can't i add ?langid=2 in every link, so that by default arabic is loaded???
The you should backup your current scripts and overwrite them with default files. By doing so you know immediate if the problem is because of an edit or not.