I wasn’t quite aware of how many English words I’m using in my daily life. I use all of those you mentioned and even more, like the F-word or sh*t. But what I don’t like is when we are using words in a wrong way like “handy” for mobile/cellphone.
Germany has continuously been integrating words from foreign languages over the centuries, nothing new at all here. Until the 19th century, these were mostly Latin, French and even Italian words, whilst after WW II, they were predominantly English ones. The confusing thing for non-native German speakers is that, in most cases, the foreign pronunciation and spelling were kept unchanged which means you have to know how to pronounce, e.g. Girokonto or Journal, correctly in Italian or French in order to speak proper "German".
Hi, am 65 y.o., is that "old" enough for an "older" person? ;-) Am working since school in different IT / HiFi / Software companies and spent some time in UK too. People like me are speaking Denglish most of the time. Just not that fast as US ladies. :-) My business life is filled with English expressiones. But I make myself little thoughts about words are native German or not.