import string
alphabet = string.ascii_letters+string.punctuation

'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~'

df.col.str.strip(alphabet).astype(bool).any()

df = pd.DataFrame({'col1':['abc', 'hello?'], 'col2': ['ÃÉG', 'Ç']})


    col1    col2
0   abc     ÃÉG
1   hello?  Ç

df.col1.str.strip(alphabet).astype(bool).any()
False
df.col2.str.strip(alphabet).astype(bool).any()
True

def strip_character(dataCol):
    r = re.compile(r'[^a-zA-Z !@#$%&*_+-=|:";<>,./()[]{}']')
    return r.sub('', dataCol)

df[resultCol] = data[dataCol].apply(strip_character)