What languages is the interface available in? Why do some contents still appear in English after I select Korean? Will the language of sent documents follow the interface language?

The interface supports nine languages: Traditional Chinese (default), Simplified Chinese, English, 日本語, 한국어, ไทย, Deutsch, Français, and Español. You can switch languages from the globe icon in the top right, the top right of the login page, or "Personal Settings → Interface Language," and the change will be saved to your account. System data (product names, categories, etc.) currently supports only four languages: Traditional Chinese, Simplified Chinese, Japanese, and English. When you select other languages, the screen text will display in that language, but data will display in English. Untranslated text will display in the original Traditional Chinese. Interface language only affects what you see on your screen and does not affect sent documents: when printing a document, separately select the "Document Language" (Traditional Chinese, Simplified Chinese, Japanese, or English); the language of public pages is set by the seller for each public page.