青云翻译

Theoretically speaking a foreign language is relative to (or independent) in terms of the speaker's native language of all the other speaker.

Theoretically speaking foreign languages is relative to (or independent) speaker of the language of all of the other mother-tongue speaker.

In the theory the foreign language is opposite in (or is independent possesses other storyteller's language which in) storyteller's mother tongue says.

Theoretically speaking foreign language) that is, in relation to speak (or independent of the purposes of the mother tongues of people who speak the language all the other.

Theoretically speaking foreign languages is relative to (or independent) speaker of the language of all of the other mother-tongue speaker.