One can speak english with a “jewish accent” and I dont mean yeshivish either. If you are so concened about seperate jewish speech, you can speak with this accent. I do not have this accent, but many family members do.
I suppose you can speak Spanish, Hebrew , French etc with a similar accent, You can easily communicate with others and still keep your jewish identity.
English is the language of the world, Since I was born in the US I am biased toward English even though I can speak Spanish and Hebrew.
Yiddish is the language of the Ghetto and sounds like German and I dont care to speak like a German and all they have done.