/usr/share/liblangtag/common/ is in liblangtag-common 0.5.7-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/liblangtag/common/bcp47/
/usr/share/liblangtag/common/bcp47/calendar.xml
/usr/share/liblangtag/common/bcp47/collation.xml
/usr/share/liblangtag/common/bcp47/currency.xml
/usr/share/liblangtag/common/bcp47/number.xml
/usr/share/liblangtag/common/bcp47/timezone.xml
/usr/share/liblangtag/common/bcp47/transform.xml
/usr/share/liblangtag/common/bcp47/transform_ime.xml
/usr/share/liblangtag/common/bcp47/transform_keyboard.xml
/usr/share/liblangtag/common/bcp47/transform_mt.xml
/usr/share/liblangtag/common/bcp47/transform_private_use.xml
/usr/share/liblangtag/common/bcp47/variant.xml
/usr/share/liblangtag/common/supplemental/
/usr/share/liblangtag/common/supplemental/likelySubtags.xml