Marc Millas <marc.millas@mokadb.com> writes:
> Re-reading my post, I see that even the élise is not sorted correctly on
> w10...
Sort orders aren't even particularly guaranteed on different releases
of the same platform, let alone totally different platforms. glibc
made major changes to their collation rules not long ago:
https://wiki.postgresql.org/wiki/Locale_data_changes
At one time we thought that migrating to ICU sorting might bring
a little more stability to this, but I think what we've found so
far is that it's just different :-(
regards, tom lane