Its badly translated. Korean uses sounds so English names are written in a way that helps pronounce them in Korean. ...I'm bad at explaining. I'm guessing shyman is Simon, Shasha is Sasha, and humming I have no clue
To further explain, Korean doesn't have direct translation to English (foreign) names so it must use terms that are phonetically similar. An example would be Katakana alphabet from the Japanese language. This alphabet is exclusively used for foreign words but tries to use symbols closest phonetically. Like コヒ= Kohi = coffee or Alec = アレク = Areku/Aleku
Yes, the translators are being a little too literal.
샤이먼 = sha ee mun
샤샤 = sha sha
허밍 = huh ming
The names sound weird in English so I do think what the translators did in earlier chapters of Simon, Sasha, and Hemming sound better though. Shyman is a little weird lol.
....... Shyman, Shasha, Humming?