Thank you very much! I see not all strings are translated, will they remain in English (which is ok) or not be displayed?

Thank you for merging it!

I see not all strings are translated, will they remain in English (which is ok) or not be displayed?

This is due to Windows character encoding reason.
On Windows, UTF-8 encoded strings are used in GTK internal, however, text console (stdout/stderr) uses system encoding (e.g. cp932 on Japanese Windows). Therefore, strings output to the console need to be left untranslated because strings containing multibyte characters will be garbled.