Use markup in \replace when lilypond is expecting a string?

[P J]

Sorry if this is a silly question... but I am struggling with the
\replace function.

Let's take this example:

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\markup \replace #'(("100" . "hundred")
                    ("dpi" . "dots per inch")) "A 100 dpi."

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What code should I use if rather than replacing "100" with "hundred" I
want, say, to replace "100" with a markup, for instance:

\markup \concat { "1" \translate-scaled #' (-0.5 . 0) "00" }

I have not been able to figure this out!

Thank you

PJ