Password guide for US
Use a sentence made put of 4 random words. Might add special character, but never in the leet speak style, because that is easy to force through.

Password guide for CZ
For the love of god, DO NOT USE z,y,č,ž,ř,š,ť,ď,ň,á,é,í,ó,ú, or ů under any circumstances... I'M BEGGING YOU!!!