/usr/share/adminer/adminer/lang/ is in adminer 3.3.3-1+deb8u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/adminer/adminer/lang/ar.inc.php
/usr/share/adminer/adminer/lang/ca.inc.php
/usr/share/adminer/adminer/lang/cs.inc.php
/usr/share/adminer/adminer/lang/de.inc.php
/usr/share/adminer/adminer/lang/en.inc.php
/usr/share/adminer/adminer/lang/es.inc.php
/usr/share/adminer/adminer/lang/et.inc.php
/usr/share/adminer/adminer/lang/fr.inc.php
/usr/share/adminer/adminer/lang/hu.inc.php
/usr/share/adminer/adminer/lang/it.inc.php
/usr/share/adminer/adminer/lang/ja.inc.php
/usr/share/adminer/adminer/lang/lt.inc.php
/usr/share/adminer/adminer/lang/nl.inc.php
/usr/share/adminer/adminer/lang/pl.inc.php
/usr/share/adminer/adminer/lang/pt.inc.php
/usr/share/adminer/adminer/lang/ro.inc.php
/usr/share/adminer/adminer/lang/ru.inc.php
/usr/share/adminer/adminer/lang/sk.inc.php
/usr/share/adminer/adminer/lang/sl.inc.php
/usr/share/adminer/adminer/lang/ta.inc.php
/usr/share/adminer/adminer/lang/tr.inc.php
/usr/share/adminer/adminer/lang/zh-tw.inc.php
/usr/share/adminer/adminer/lang/zh.inc.php