@elFlashor Localization and outsourced QA are the two places where collecting names for the credits can be genuinely difficult, depending on how good the subcontractor is at keeping track. Personally, if I were to manage a project, I would opt for keeping our own record.
Some flagship titles end up with immense credits lists because of their workflow issues (e.g. the release day is near, the game is half-done, but one of your subsidiaries has some HR to spare).