So a bit of context for this question:
I was watching a youtube video from a Estonian creator called Mudan. They are in an anime convention and around the 5:18 mark his brother tries to remember the dubbed Pokemon opening and says that he is "not sure if he remembers the estonian or finnish versions", and then proceeds to sing it (in post it's clarified that it's finnish).
I'm Brazilian and am aware of similarities between languages, even if I never studied spanish before I could understand the general gist of a sentence. That being said I find it really impressive if these 2 languages are similar enough that you could remember lyrics of a song and still not be sure which language it's from.
It's also possible that these being youtubers they are simply playing it up for the camera and the differences are not all that similar. But I'm unsure and decided to ask.
Thanks 🙂
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Christ-kun