A specialization costs 2 Karma. At creation, it costs 2 BP. If your GM allows you to break the one specialization per skill limit, you simply pay for each one.
However, looking again, you have the specialties in your native language. You don't pay anything for your native language. Therefore, you simply buy the rating in Or'Zet, which you said is 2, and the specialization, which is 2 BP. You have all lingos in your native tongue, and you never make tests to understand your native tongue.
Therefore, your cost for what you asked is 2 Knowledge points and 2 BP. If you have no more knowledge points, they cost 2 BP each - as I said, exactly half the cost of active skill points. I don't know if you can use knowledge points for the specialization, I don't think the book mentions it.