A collection "test" with the following documents

{name:"green apple"} {name:"red apple"} {name:"banana"}

In the shell, running
db.getCollection('test').find({$text:{$search:"apple"}})
or
db.getCollection('test').find({$text:{$search:"banana"}})
will return results as expected

db.getCollection('test').find({$text:{$search:"banana",$language:"none"}})
will also return 1 result as expected

But
db.getCollection('test').find({$text:{$search:"apple",$language:"none"}})
will return NO result