chore(l10n): Improve zh-tw localization quality

[toto6038]

Description

Change some words to the common ones in Taiwan , e.g. 默认->預設, 文件->檔案, etc.

c.c. @SiderealArt

@agalwood just curious that do you consider allowing the website to be localized? I'm willing to help.

Checklist:

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you linted your code locally prior to submission?
• Have you successfully ran app with your changes locally?

[5idereal]

The website does not appear to be open-source though.