Do you speak English softly? Do you speak louder in your own language? I’ve come across a few people recently who actually spoke English very well in terms of grammar and vocabulary, but they spoke in a much softer tone.
If this is you, then you might not come across as interesting or confident at a party or business meeting if we’re straining to even hear you in conversation.
Naturally it may depend on the situation you are in, but overall just speaking a little louder and projecting your voice will help give people a more positive impression of you. It can make you seem more confident, and with time, you yourself may even feel more confident as a result.
I can imagine some Czech students may say “I don’t want people to hear my mistakes.” It’s understandable to think this, but by speaking softer you’re telling yourself and the world that your opinion doesn’t matter.
Next time raise your voice even by 10% and keep it there. Smile too.
You may be surprised that sometimes that best way to improve your communication goes beyond mere grammar and words.