Actually Finnish isn't a Germanic language. It isn't even in the same tree with all the other indoeuropean languages.
See the images in this link:
https://www.theguardian.com/education/gallery/2015/jan/23/a-language-family-tree-in-pictures

We, Finns, Hungarian and Estonian (finnougric) almost aren't in the same galaxy with the rest of the languages. :D

One of the world famous story tellers and a linguist, Tolkien got inspiration from Finnish language when creating Elvish language.

While Tolkien did struggle with Finnish, he still appreciated it enough to use it as a basis for some of his made-up languages, especially the Elvish language Quenya. Linguistically, it is very close to Finnish, particularly through its use of suffixes to change the meaning of words, and the lack of gendered pronouns. Furthermore, Tolkien also directly incorporated Finnish words into Quenya. For example, the Quenya words ‘tul’ (come), ‘anta’ (give), and ‘pitya’ (small) are almost the same as they are in Finnish. The Ainur, a near immortal race similar to demigods, also appear to derive their name from the Finnish word ‘aina,’ meaning ‘always’.

Source: https://theculturetrip.com/europe/finland/articles/how-tolkien-was-inspired-by-finland/

I think most of us common Finns never truly turned to Christianity when it arrived here with the Swedes few hundred years ago. We only said we'd be good Christians. But we still predict weather from frogs and cast few spells every now and then. :D

Edit:
Here's a link to the global language tree:
https://westernman.org/languages-of-europe/