Sometimes it’s a second (or fifth) language for Indian people, but it’s also a dialect which is just as valid as your dialect and it’s got the second most English speakers in the world. The accent may just be an accent, you definitely shouldn’t assume that it’s a sign someone will have incorrect English. It sounds like you’re not in practice, but that’s definitely how I read your comments
I said Schmierkampagne in real life yesterday.
I’m a native English speaker and Zangendeutsch is ruining me.