The script generate_family_file.py accepts family names that are later not usable for pywikibot which the throws an error:
Traceback (most recent call last):
File "pwb.py", line 229, in <module>
['generate_user_files.py'])
File "pwb.py", line 106, in run_python_file
main_mod.__dict__)
File "generate_user_files.py", line 481, in <module>
main()
File "generate_user_files.py", line 473, in main
force=force)
File "generate_user_files.py", line 311, in create_user_config
main_family, main_code, main_username, force=force))]
File "generate_user_files.py", line 126, in get_site_and_lang
fam = pywikibot.family.Family.load(fam)
File "/root/pywikibot/pywikibot/tools/__init__.py", line 1819, in wrapper
return obj(*__args, **__kw)
File "/root/pywikibot/pywikibot/family.py", line 1010, in load
'Name of family %s must be ASCII characters and digits' % fam
AssertionError: Name of family madgn_it must be ASCII characters and digits