Some time ago, at another thread I had written (latlh Dochmey} and
{latlhmey Doch}, and asked "is any of the two preferable, or more
correct than the other" ? Then SuStel replied: "that depends, do you
want to say the other's things or the others' thing ?"

Now, lets forget for a moment that in order to say "additional things"
I can just write {latlhmey}; would it be correct to assume that both
(latlh Dochmey} and {latlhmey Doch}, apart from the above translations
written by SuStel, can mean "additional things" as well ?

latlh Dochmey
other (additional) things
another's things
others' things (because plural suffixes are optional)

latlhmey Doch
others' thing(s)

I wouldn't use latlhmey X to mean additional Xs. Explicitly using the plural suffix seems to lock it into the "someone else" meaning, though I can't say exactly why.

-- 
SuStel
http://trimboli.name