There is absolutely no letter for y. Instead, this audio is indicated by doubling the stroke connected into the baseline from the vowel letter. On the 7 essential vowels, 4 could possibly be preceded by a y audio, and these 4 ended up published as a dot next to a line.
The Korean language of your fifteenth century had vowel harmony to a larger extent than it does nowadays. Vowels in grammatical morphemes modified according to their ecosystem, slipping into groups that "harmonized" with one another. This influenced the morphology from the language, and Korean phonology explained it regarding yin and yang: If a root word experienced yang ('brilliant') vowels, then most suffixes attached to What's more, it casino had to have yang vowels; conversely, if the basis had yin ('dim') vowels, the suffixes had to be yin in addition.
Usually there are some exceptions, but All round, the pronunciation regulations of the language are very simple and crystal clear. You will not locate tones in typical Korean, so getting started with speaking is kind of easy.