>>> tbl = maketrans('евица', 'evica')
>>> print('чечевица'.translate(tbl))
чeчeviцa
>>> print('чечевица'.translate(tbl.update({
ord('ч'): ord('ch'), # I cant do it, because ord accept only one letter, no more
})))
# I want get this result: chechevica
import re
res = re.compile(r'\w')
tbl = {'ч':'ch'..}
print(res.sub(lambda x: tbl[x.group()], 'чечевица')