When "stand by" stands alone, it is not about being next to someone (physically, or metaphorically, as in supporting them) -- it is about waiting. There is also a sense that you should be ready to go when called.
I think "Bekle." is probably too simple a translation, so to capture the "readiness" perhaps:
Hazır bekle.
[OR]
Hazır durumda bulun.
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hetê duranra ame îlawekerdene, June 17, 2015
hetê duran ra ame girêdayene, June 17, 2015