The first is no good; I have corrected it to what is acceptable but little used nowadays: Nobody could acquire a foreign language in a year , were he a linguistic genius. Nobody could acquire a foreign language in a year even if he was/were a linguistic genius. )
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Manid• Nobody could acquire a foreign language in a year was he a linguistic genius.In the second one, it's okay to substitute "was" for the subjunctive "were," but in the first one, I don't believe it works.
* Nobody could acquire a foreign language in a year even if he was a linguistic genius.
Danny2312There's somebody outside wants to talk to you.To my ear, ellipsing the "who" in the relative clause seems very casual - or perhaps it's regional.