Fix unicode character class in language name regex

tests/test_data_languages.py

@@ -83,7 +83,7 @@
     "tlh_Latn": "Klingon is an artifical language.",
 }
 
-LANGUAGE_NAME_REGEX = "^[-'’ʼ\p{L} ]+(, [-'’ʼ\p{L}/ ]+)?( [(][-'’ʼ\p{L} ]+[)])?$"
+LANGUAGE_NAME_REGEX = r"^[-'’ʼ\p{L} ]+(, [-'’ʼ\p{L}/ ]+)?( [(][-'’ʼ\p{L} ]+[)])?$"
 # Some scripts have abbreviated names for reference in language names that are
 # sufficient in context. If an alternate is listed here, it should be used
 # universally and consistently across all language names.