[bpeebles]

There are admins on all of the Wikipedias under the WMF umbrella--each one sets their own rules for how admins are picked and how long, if limited at all, their terms are. I do not know what the process is for the Arabic-language wiki in question.

[akolbe]

Also a community vote. (The above sysop logs state "according to vote result" and "successful nomination" for the entries logging admin rights being given.)