I will make this a series after Spanish. Sorry, voice acting is now closed. A: Exact same except he gets kidnapped in episode C. Ą: Equivalent of A in episodes beyond Ę. He also has Prototype A's design. B: Exact same except he doesn't get wounded. C: Exact same except he gets kidnapped instead of dying. Ć: Equivalent of my Spanish CH. D: Exact same except he doesn't get kidnapped. He also gets wounded instead of B. E: The villain and equivalent of F. He is trying to spell "przyjaciele" by kidnapping the other letters. Ę: Equivalent of G except he dies in episode W instead of Q. F: Exact same as his lowercase self. He is willing to help anybody. G: Equivalent of H. H: Exact same as Spanish. I: Exact same. J: The main character and equivalent of N. She gets a bit shy most of the time. Her tittle also can rip through someone when shot. K: Exact same as Spanish. L: Exact same except he gets kidnapped. Ł: Equivalent of my Spanish LL. M: Exact same. N: He is just a supporting character who is taller than the English N. He dies in episode R due to getting ripped in half by E while trying to protect R. Ń: Equivalent of my Spanish Ñ. O: Exact same except he isn't a bully. He now has the stress mark gem. Ó: He is a tire. He doesn't really do much. P: Has the same design as English P, but is the equivalent of English O. Q: Exact same as Spanish except she doesn't die. She doesn't get her own episode, as she makes her debut in episode P. R: Exact same. S: Exact same except he joins the heroes instead of getting kidnapped. He also dies like English C in episode U. Ś: Equivalent of Q. T: Exact same. U: Exact same. V: Exact same except he also dies in episode W. He doesn't get his own episode, as he makes his debut in episode W. W: Exact same, but actually has a role in the series rather than doing nothing. She spells "bojaźliwy" in J's nightmare (Yes, Ź and Y have early appearances). X: Equivalent of my Greek Heta. He doesn't get his own episode, as he makes his debut in episode W. Y: She plays a similar role to English D. Z: Equivalent of X. His dead body gets chained in episode Ź. Ź: Equivalent of Y. Ż: Equivalent of Z. The dot is E's cave (Credit to @Nguyen_CLS_Noolish for the idea).
Credit 2 Every1, especially @Nguyen_CLS_Noolish for the base of Ą. UPDATE: Q, V, and X don't get their own episodes due to not being in the Polish Alphabet. They are only used in loanwords.