Bear

Bear was probably the first written language to be deciphered way back when the world was originally released. It's very easy to translate because it's based on actual Norse runes and also because a couple of the letters look the same as they do in English. You can find Bear written all over Grizzleheim, but specifically in Northguard where the bear Vikings live, hence the language being dubbed "Bear." On some statues in Northguard, you'll even find the names of certain KingsIsle employees who worked on Grizzleheim. Here are some examples of Bear:

While Bear is pretty straightforward to translate, there seems to be an offshoot of the language that simultaneously exists in Northguard. I have never seen anyone fully decipher this language but it has been referred to in the past as "Old Bear," and it was even theorized by some player to be the 'older language' that preceeded Bear. Now, that seems like a lot of guessing, especially since neither of the languages are even referenced in the game; however, I think that the theories surrounded Bear and Old Bear come from the real-life languages used by Vikings, Elder and Younger Futhark. Elder and Younger Futhark are the Norse runes that I mentioned earlier, and Elder Futhark is the oldest known form of the runic alphabet that KingsIsle used to create Bear. Although Bear seems to be created via a mix of Elder and Younger Futhark runes, it would actually make sense, historically speaking, if there were also 'older' runes mixed in with the decipherable Bear runes. Here are some examples of "Old Bear":

Regardless if Old Bear can be deciphered as another language or if it is simply an aesthetic texture applied to objects in Grizzleheim, Bear has been fully translated and actually has characters that correspond to every letter in the alphabet. Here's my translation table for Bear: