Currency symbol on the wrong side (zł100, and it should be: 100 zł)

Hello. I have a problem with the PLN (zł – Polish zloty) currency – the currency symbol is always on the right side (100 PLN or 100 zł or 100 zloty) but even though I have set this function in the plug-in, the format is still: 1 symbol, 2 amount (e.g. PLN100 and not 100 zloty). The problem apears in card, partly in checkout and all the emails sent to clients. In the store (and partly in checkout) there’s no problem. Please help