Language in some results not in ISO-639-1 standard



He are receiving some tweets with a language not prsent in ISO 639-1 Tables

In this page is indicated that lang par is from ISO 639-1, some we assume that the results comes from the same standard.

One example is the following tweet

Where the language is “in”, which language is that?

We have around of 4k tweets from an scenario of 300k with that language.


I’m assume that the problem is the same of this post: