Hi,
After 2 tests with recent images (5.77) with debian stretch for s912 (balbes ilmages) and dev image for pineh64, I get the same issue when configuring locales. I selected fr_FR.UTF-8 in armbian-config and I also ran manually dpkg-reconfigure locales and locale-gen, but I ended each time to default locales settings (ANSI_X3.4-1968). Only the LANG variable is set to fr_FR.UTF-8 and all LC_XXX variables are set to C.
To solve this issue, I have modified manually the /etc/enviro