If you're fine playing the game in english Im pretty sure you can skip that step completely.
Theres also a step in the bootleg process where a txt file will open and usually mention some errors like missing files, i cant remember what part, but if thats what youre talking about, It's normal and is mentioned on bootleg as normal and in eq2alyza's tutorial as normal.
Im not sure about the whole blank iso or movie loader thing because I totally skipped the converter part. Because I'm pretty sure its whole point is to be able to easily translate the game's texts.
Lol try to be a little more considerate, it can be difficult to construct an air tight tutorial on something like this because bootleg has been an ongoing project involving lots of mods and there are plenty of variables involved.
Keep in mind too that bootleg isnt even eq2alyza's project, she just took the time to write a comprehensive tutorial for people that didn't want to learn with existing material on this forum or couldn't and wouldn't stop bothering her.
Anyway, hope i helped a little bit.