I do not have an opinion about Hebrew.  But I have been led to believe that in this case "sons" as in the NAB and Grail Psalms (and RSVCE, and Jeruslem Bible...) is a mistaken rendering of the Hebrew.  

Interestingly enough the Douai-Rheims has "children" where the Vulgate has "filii" which means the rendering as "sons" is not even traditional in the anglophone Catholic world.  (And since the Douai Rheims was to be a translation of the Vulgate it means the understanding of the Vulgate even centuries ago was "filii" for plural children of any sex!)  And strangely, the NRSV, notorious for having "inclusive language" of the kind the decades long pressure campaign to reform English wants, has "sons". 

It's also not at all analogous to the gripe about "Men" for "Homines" in the credo since "man" and its plural "men" is a word for our kind in today's English but "sons" has been masculine only as far back as we know it.