I noticed a weird sound correspondence between Finnish and Northern Sami, and that is a list of words which pairwise end in -a or -ä in Finnish (this is the same archephoneme), and end in -i in Northern Sami.
- päivä, beaivi. A day. Or, a sun.
- aika, áigi. Time.
- kala, guolli. A fish.
Then there's a list of words that do exactly the opposite:
- kieli, giella. A language.
- neiti, nieida. A girl.
I can only think of one example that doesn't fit into this list, (this one can maybe be explained away by differing morhpology because it's a different part of speech) and that is
- njeljä, njeallje. Four.
It looks like in all cases, Eastern Saamic languages like Kildin, Skolt and Ter, together with Hungarian for some reason, have lost this final vowel.
Now, I don't know much Sámi, and even less Finnish/Karelian, so this small sample size might be misleading me, but it looks like -a/-ä and -i swapped places here. How can that have happened?
Edit: Oh yeah, how could I forget these:
- yksi, okta. One.
- kaksi, guokta. Two.
- kolme, golbma. Three.
So the sound change does not apply to "three" or "four", but does to "one" and "two"? Now this is getting bizarre.