The Greek that is translated as “poor in spirit” or similar in English is translated in Low German as vör Gott beddelarm / “poor as a beggar before God” (translation by Rudolf Muuß, publ. 1975; similarly in translation by Johannes Jessen, publ. 1933).
Note that the same term (beddelarm) is also used by both versions for “extreme poverty” (βάθους πτωχεία) in 2 Corinthians 8:2.