On pixiv Requests, if both the fan and the creator have their display language set to either Japanese, English, Korean, Simplified Chinese, or Traditional Chinese, the following items are automatically translated.
・Request terms (title and description)
・Request details
・Co-request messages
・Fan letters
You can easily send requests to creators who use a different language by writing in your preferred language.There's no need to use machine translation beforehand.
Please note that automatic translation to/from Malay and Thai is not not supported at this time.