Text index creation failure with unsupported language

MongoDB Atlas
,
1

Hi

While attempting to create a text index on embedded multi language document, I have an error with unsupported language (some documents embeds polish translation).

Reading the documentation, I though that it would be possible to specify a default_language for unsupported language as follows

db.myCollection.createIndex(
   {
   	"descriptiveInformations.title" : "text",
   	"descriptiveInformations.description": "text"
   },
   {
   	language_override: "lang",
   	default_language: "none",
   	weights: {
       		"descriptiveInformations.title" : 5,
       		"descriptiveInformations.description": 2
       	},
       	name: "my_search_idx"
    }
)

I would have thought that default_language would have been used when mongo fails to resolve language while reading embedded document.

Am I wrong?

I run in an old mongo version 5) and may upgrade provided that it solves my issue.

Thanks