Normal for a 1st class musician which rv is .
I have heard the same thing more or less from 20 Germans in one of the best orchestras in Germany .
I would think it be even worse for those doing solos.
Also, I agree that knowing the language really helps !
At one time I dreamt in German and most Germans thought I was a German .
Now , over a decade not speaking it and old age takes much away from me , esp.in Bach Cantatas . It hurts .