Each comic page has its own folder. If the comic page does not have a folder yet, when you click the Create File button, name the file 222/English.txt (for example.)
In the folder for that comic, create a new .txt file. Give it the name of the language as it should appear on the webpage. For example, the Spanish language file should be "Español.txt".
Paste in the transcript.
HTML formatting is allowed. Make sure to escape any ampersands (&) with &, less than (<) with <, and greater than (>) with >.