If you're using MySQL 5.7 or above, it's recommended that you use the JSON data type for housing translations in the db.
This will allow you to query these columns like this:
NewsItem::where('name->en', 'Name in English')->get();
Or if you're using MariaDB 10.2.3 or above :
NewsItem::whereRaw("JSON_EXTRACT(name, '$.en') = 'Name in English'")->get();