Custom text in repeats

[Jakob Pedersen]

    Hello all
    
    I'm trying to replicate this original that has non-standard text in
    the final volta of the repeats.

    Having used the instructions about manual repeats in section 1.4.1
    of the documentation, I've come up with this:
    
      \version "2.24.1"
      \language "deutsch"
      
      global = { \key b \major \time 4/4 }
      
      voltatekst = \markup { Efter sidste vers. }
      
      \relative { \global
        b'4 a g f
        \set Score.repeatCommands = #'((volta "1-4"))
        f f2 r4
        \set Score.repeatCommands = #(list(list 'volta voltatekst)
      'end-repeat)
        f2 r2 \bar "|."
        \set Score.repeatCommands = #'((volta #f) end)
      }
    
    That produces this rather festive result:

    I assume this is because the text is being interpreted as dynamic
    expressions and whatnot.
    
    Is there any way to force lilypond to assume that it's simply text
    and not any sort of musical _expression_?
    
    
    Best wishes,
    
    Jakob Pedersen