Tak Tack

Think about how many times you say "Yes" or respond with affirmative sounds when someone is talking to you.

Yes, of course, uh huh, right, exactly, yeah, mmhm, I agree.

Probably just as often as you say "Thanks." 

Thanks, thank you, thanks so much, no thank you, thnx.

Try not to let this blow your mind, but "tak" is Polish for the former and "tack" is Swedish for the latter.

The difference in their pronunciation is negligible.

The worst thing that can happen when lost in translation?

Swedes exhibit an exceptional level of agreeability and Poles express extreme thanks for it.