TUNIC is a great little game I’ve been waiting a long time for. Throughout the game and manual there is a seemingly incomprehensible language used. It’s not a simple cypher and instead works on a vowel/consonant combination. I did not figure this out at all, and all credit goes to Steam user oposdeo who provided his translation guide in this thread.
To explain a bit, a cypher is a simple 1-to-1 change, so like a = 1, b = 2. Or for example “hello world” could be “!@##$ %$^#&” (where ! = h, @ = e, etc), each unique letter is represented by one unique character. When most games have a translatable language, they use this system (think the Al Bhed language in FF10). They’re relatively easy to figure out once you have enough samples to work on and can figure out a few key words (like “the” or “and”).
In this game’s language the individual glyphs are a combination vowel/consonant sound. Instead of just 5 vowels covering all the different vowel sounds (think how “O” works in owe, too, now, boy, nor), each vowel sound gets it’s own symbol, and instead of the other 21 letters representing a mixed bag of consonants (note how J and G, C and K, are sometimes the same, etc) you have explicit symbols for each sound. For example with consonants, “ch” and “sh” are their own symbols, whereas “ph” and “f”, or a hard “c” and “k” are the same.
Anyway, I’m sure I’m doing a terrible job of explaining it, for better details refer to oposdeo‘s guide. Long story short, I used his guide to create a little web tool to do the translations for you: TUNIC Glyph Translator. Works pretty well in mobile if I do say so myself.