Languages defined in `wmgExtraLanguageNames` ( [[ https://noc.wikimedia.org/conf/highlight.php?file=InitialiseSettings.php | InitialiseSettings.php ]]) for Wikidata should be in defined for commonswiki too so their language support would be in sync.
Languages should be working as other changes needed are already done for Wikidata.
'kea' => 'Kabuverdianu', // T127435Language codes to be added
'nod'kea' => 'ᨣᩴᩤᨾᩮᩥᩬᨦ', // T93880Kabuverdianu',
'nys'nod' => 'Noongar'ᨣᩴᩤᨾᩮᩥᩬᨦ', // T127858
'ota'nys' => 'لسان توركى', // T59342Noongar',
'rwr'ota' => 'मारवाड़ी', // T61905لسان توركى',
'sje'rwr' => 'bidumsámegiella', // T146707मारवाड़ी',
'smj'sje' => 'julevbidumsámegiella', // T146707
'srq'smj' => 'mbia cheë', // T113408
julevsámegiella',
'srq' => 'mbia cheë',