What is the word for someone who speaks the same language as another, homoglot?

I am after the term of someone who speaks the same language as someone else as opposed to someone who speaks only a different language. I don't mean this in a national context such as compatriot, compadre or fellow-countryman, purely from the standpoint of language users. Something like homoglot, equilinguist... show more I am after the term of someone who speaks the same language as someone else as opposed to someone who speaks only a different language. I don't mean this in a national context such as compatriot, compadre or fellow-countryman, purely from the standpoint of language users. Something like homoglot, equilinguist or something like that?
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