I've been interacting with a Polish web and got very confused because what happens with stand-alone w, that seems to mean in. Indeed Google Translate pronounces it as a v. First time I see a word in any language that consists only of consonants :-m
Polish is quite tame with these as far as Slavic languages go. "Strč prst skrz krk" is a proper sentence in Czech and Slovak :)
(if you are confused think about how the y in year is a vowel sound but works as a consonant in the syllable)
You can extend this with exclamations/onomatopoeia (eg: 'hmm', 'shh', 'brr'), but can see that these are not 'normal words'.
Not unlike Russian where the reversed R is the same sounds just in reversed order (i+a) and it also means I.
Polish prefers to have sounds separated so it's "ja". And it's never capitalized, English is very egocentric about it's pronouns :)