T25.S3G2Q10

The phrasing of this question was a little bit confusing,when it says L and N speak the same language as each other ,i thought that they could have 1 language in common and accord to it N could go in X and K could go there with it then the maximum number of people who could speak Turkish would be 4 (K,N,H ,I)and not 3,but it was 3,if it said L and N speak the same languages as each other then i see how it could be 3,but if it says the same language doesn`t it have to be 1 language and not two?