[It's pure chance that he understands it, actually. But SEELE's headquarters was hidden in Germany, and so understanding German was probably inevitable--even if he was always meant to serve his purpose at NERV in Japan.
He was under strict command not to reveal this, but he's aware it doesn't matter now.]
0 GERMAN, MEET PURE HEADCANON can we just assume they're speaking German now tho yikes
He was under strict command not to reveal this, but he's aware it doesn't matter now.]
Ja. Ich spreche Deutsch!
[Kaworu smiles up at him.]
Es ist mir egal.