I tried to register an account, but the email never came, so I couldn't set a password.Why can't you use the translation packs on the website? They work fine with the base game. It's 3 simple steps.
If you are attempting to use a translation pack with other mods or patches, then it will most likely cause problems. I believe this has been explained to you in the past. If you are attempting to create your own translation of the game - this isn't the thread for ren'py technical support for people who create mods and patches. You should to seek support in a different thread or on a different site that specializes in modifying ren'py and translations.
I also tried to download the .rpa file that had been translated from the official website. After running the game, an error occurred saying "I don't have xxxx.otf" font file.
I don’t know how to put the font file into the specified location.