Is it okay to not use %d in msgstr, even if %d in msgid?

[Åsmund Skjæveland <aasmunds ulrik uio no>]

Example:

msgid_plural[0] "Saved %d document."
msgid_plural[1] "Saved %d documents."

Do I have to use the '%d' in [0], or can i use a word for 'one' instead
of the number 1?

-- 
Åsmund Skjæveland <aasmunds@fys.uio.no>

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