Need help with German dialog for book?

Okay, so I've done my best with what little Deutsch that I understand and the help of Google Translate, so I need a fluent (or native) speaker to fact check the phrases where I'm not certain, bitte.

I'll provide the Deutsch and my intended meaning. What I need to know is if I have anything off/uncomfortable/inaccurate. This character is not a native speaker, but is fluent. English is her first language, but she's suffering bilingual aphasia (from brain trauma), so she's speaking Deutsch, to her best friends, if that background matters (at the very least, it should make the conversation make more sense). Thank you!

"Ja. Ich spreche Deutsch. Warum ist das einfacher?"

Yes. I speak German. Why is this easier?

“Muss ich Spanisch sprechen?”

Do I speak Spanish?

“Deutsch ist einfacher. Jemand aufwecken Lukas.”

German is easier. Someone wake up Lukas.

"Dann füttere ihn,"

Then find him.

“Blut! Öffnen Sie eine gottverdammte Vene und füttern ihn! Blut!”

"Blood! Open a goddamn vein and feed him! Blood!" (yes, she's talking about a vampire)