>>418455>>418460It's not rocket science. All it takes is practice. For example I cannot remember the german grammar at all, yet I still know how to write every sentence imaginable even in the major dialects and with and some difficulty I can comprehend most of what is written in dutch.
Once read enough polish books, have enough conversations you will no doubt speak like a native if you try hard enough. It takes you less than a minute to figure out how to correctly pronounce:
siema
kurwa
kocham cie
Maybe 3 years until fluentcy if you really try.
