I agree. And it makes sense why it was typed - the true sender didn't want to take the chance that Poland would recognize Lithuania's handwriting and tell it was a fake. Poland writing it, on the other hand, makes no sense when the letter is typed because he would want Lithuania to know it was him.

Whether or not Poland destroyed it...well, he did in the end. [By vomiting on it aha.] Maybe the killer couldn't find it through the trash because of the...well yeah. [Vomit.]

That said, only Stiles and Sonia have enough grasp of the language to write a letter like this if we're assuming a suspect wrote it. I don't know a lick of it and I'm guessing the same goes for you Felicia.