translate.py

#!/usr/bin/env python3



trans_dict = {
'な': 'na',
'に': 'ni',
'か': 'ka',
'し': 'si',
'こ': 'ko',
'ち': 'chi',
'い': 'i',
'そ': 'so',
'た': 'ta',
'く': 'ku',
'わ': 'wa',
'ん': 'ng',
'に': 'ni',
'て': 'te',
'み': 'mi',
'申': 'su',
}

with open('input.txt') as input, open('output.txt', 'w') as output:
    for line in input.readlines():
        translated = False
        outline = ''
        for c in line:
            if c in trans_dict:
                outline += trans_dict[c]
                translated = True
            else:
                outline += c
        output.write(line)
        if translated:
            output.write(outline)

with open('output.txt') as output:
    for line in output.readlines():
        print(line)

❯ python3 translate.py
A: なにかし こち こい そちか たいくわんに いて みか 申

A: nanikasi kochi koi sochika taikuwangni ite mika su

D: 나닝가시 고찌 고이 소찡가 다이관니 이뗴 밍가모우수