My wife is a native Spanish speaker. I'm a native English speaker. At home we speak both languages nearly interchangeably. But now she has a job speaking English.
How can I most effectively help her improve her pronunciation in English?
It's common that during a conversation, she'll mis-pronounce a word, and I'll interrupt her with a correction. She appreciates these corrections, and doesn't consider the interruptions as "rude", but I fear it's not an effective teaching method (in part because she tends to make the same mistakes repeatedly).
Regardless of the language involved, how can I, as a language "tutor", help someone improve pronunciation in the most effective way(s)?