Trying to delete a language causes the following ISE:

DBD::Pg::st execute failed: ERROR: column "language" does not exist LINE 1: ...RE language = '15' UNION SELECT 1 FROM work WHERE language =... ^ [for Statement "SELECT 1 FROM release WHERE language = ? UNION SELECT 1 FROM work WHERE language = ? UNION SELECT 1 FROM editor_language WHERE language = ? LIMIT 1" with ParamValues: 1='15', 2='15', 3='15'] at lib/MusicBrainz/Server/Connector.pm line 50 Sql::select_single_value(?, ?, ?, ?, ?) called at lib/MusicBrainz/Server/Data/Language.pm line 70

Seems this was never amended when works got multiple languages, but we never actually tried to remove a language so this was hidden for like 8 years or whatever.