import unicodedata as ud
text = "des поместья, de la famille Buonaparte. Non, je vous préviens que si vous"
print(' '.join([word for word in text.split() if any('CYRILLIC' in ud.name(c) for c in word)]))
# => поместья,

# If you also need to strip any punctuation:
import string
print(
	' '.join([
			word.translate(str.maketrans('', '', string.punctuation))
			for word in text.split()
			if any('CYRILLIC' in ud.name(c) for c in word)
		])
)
# => поместья