Good morning,
could you specifiy your question? Do you want to translage a certain mod or the whole game?
To see the dialog files you can use
DLGView or WitchDLG. You can download the files
here. Install C++ 8.0 runtime at first.
I am also new to modding but I guess you could also use Djinni Editor for some translations (at least files and scripts but correct me if I am wrong).
Some of the witcher dialogues are stored in file called dialogues00.bif, which you have to extract with a program called UnBif, which is part of the "
Extra tools file".
@fc_gooner
I dont think, that there are so many tutorials for witcher 1 out there anymore. But translating a game mod or file should't be so difficult. I translated a few mods from the "Elder Scrolls" franchise by myself, 10 years ago.