Extract the full Switch script

[alphaori]

Hello, I want to extract transcripts of a visual novel game called Olympia Soiree on Switch. I already have extracted RomFS data, and the extracted files are on an unknown extension like .DAT on script folder, .CL3 in the chara folder, .tid in the game folder, .usm in the movie folder, and .hca in the sound folder. I saw some dialogue on .DAT files using Notepad and Notepad++, but it's messy and has many unknown symbols. But I know the dialogue is on there. Does someone know how to open these files correctly and copy the text?