I don't think I'll turn this into a series. A: Exact same. B: Exact same. C: The villain and equivalent of F. She tries to spell "copines" by kidnapping, puncturing, and killing other letters. I made C a girl because "copines" is the feminine version of "friends". D: He has the same design as English D, but is the equivalent of English C. E: Exact same but is a girl. F: Exact same as his lowercase self. He is willing to help anybody. G: Exact same except he dies in episode W instead of Q. H: Exact same as Spanish. I: Exact same as Spanish except she's the equivalent of N. Her tittle also isn't explosive, it can only cut holes through someone. J: Equivalent of I except he gets saved by N. K: Exact same as Spanish. L: He plays a role similar to M. He also dies in a similar way to @AlfabetonsOfficial's Spanish Ñ. M: Exact same. N: Equivalent of L. She and O get angry at I and C due to accidentally hurting them. O: Exact same but is a girl and she gets kidnapped. P: Exact same except she isn't in love with anyone and doesn't transform. She also gets kidnapped like English R instead of dying. Q: Exact same as Spanish except she doesn't transform and doesn't die. R: Equivalent of English Q. S: Exact same but is a girl and she gets knocked out cold due to C hitting her using P. T: Exact same. U: Exact same. The only thing he is needed for is helping Q aim I at C (who actually is G). V: Equivalent of W. She spells "mauviette" in I's nightmare. W: Equivalent of V. X: Exact same. Y: Exact same. Z: Exact same.
Credit 2 Every1, especially @AlfabetonsOfficial for the base of W.