Ask HN: How you improved your communication skill for interviews?

I'm twice non-native speaker (English, German) but got good enough to do communication-focused roles without big problems.

From my point of view, language requires training in grammar and a satisfactory vocabulary.

Grammar most probably really need training (like language courses), I think it's quite hard to get all these tenses and modal verbs etc. right.

For vocabulary check Duolingo, good for training.

Read a lot in the language, listen a lot to the speech.

A couple of friends who learn eastern-European languages book private lessons over Skype, you can get a professional tutor quite cheap. Not sure if this will work for English, though.

Consider spending several month abroad (some Work&Travel programm). Full integration is the best way to learn the language.

As for interviews, read a few books on interviews (like "Programming Interviews Exposed") and do a lot of interviews. Go to interviews just for training. It's just a matter of practice. After a dozen of interviews you'll know the show.

You're up for learn-as-you-go.

That's for technical/engineering positions. Today's startup of 10 people has 8 from different countries speaking with a horrible accent.

If your position is marketing - then my advise is less valid (unless you'll be marketing on your home language to your home audience).

However this advice won't work in short-term: you need at least several months of such activity. But you'll eventually improve your skills, without spending a dollar.