Blocked on T322323: Special:ContentTranslation unable to connect to cxserver on Beta Cluster.
Pre-work for T106469: Add ContentTranslation in beta features on eswikivoyage, this should Just Work™ (in InitialiseSettings-labs.php):
'wmgUseContentTranslation' => [ 'wikivoyage' => true, ],
as it should merge with InitialiseSettings.php's:
'wmgUseContentTranslation' => [ 'default' => false, 'wikipedia' => true, 'arbcom_cswiki' => false, // T151731 'arbcom_dewiki' => false, 'arbcom_enwiki' => false, 'arbcom_fiwiki' => false, 'arbcom_nlwiki' => false, 'arbcom_ruwiki' => false, // T262812 'sysop_itwiki' => false, 'testwiki' => true, 'test2wiki' => false, 'wg_enwiki' => false, ],