To me, writing in English comes naturally (irrespective of the grammatical and lexical quality of my sentences). Although it often borders on Denglish, writing in my native tongue always felt awkward and like I'm suffering from autoglossophobia – the fear of one's own langauge. In English I feel far more at ease.

I can understand that people like to switch languages, even in one sentence, in particular when it comes to precision in describing things or evoking feelings. But I rarely do that now. I had this inclination more often when I was more fluent in Spanish than I am today, so that I could switch between three languages. Still, German has been the least favorable one of all three.