language error not defined

I am seeing this message in one of the domains in our server, "Disk Quota: [4402MB / 200MB] (update quotainfo)(You have exceeded your quota:language error, not defined - ?)". Kindly direct me to article to solve it or help me me provide a support before it landed me in problem with the web site.
Thanks

which language do you use ?
in which url do you see that ?