APKBUILD examples:Special Subpackages Languages
To keep packages small, languages files (LC_MESSAGES) are places in a seperate -lang subpackages.
... subpackages="$pkgname-lang" ...
abuild is throwing a warning if it detects translation.
>>> WARNING: package*: Found /usr/share/locale. Maybe add $pkgname-lang to subpackages?
Please note that some packages will automatically detect NLS if gettext-dev is installed at build time. If gettext-dev is not a direct or indirect dependency then should most likely no -lang be needed.