my_list = ['lloc', [['.', 'orgstart']]]
def my_function(array):
res = ''
for i in array:
if type(i) != list and i != '.':
res += i + ' '
elif type(i) == list and i != '.':
res += my_function(i)
return res
result = my_function(my_list).split(' ')[:-1]
print(result) # -> ['lloc', 'orgstart']