下面的代码获取一个输入文件夹，其中包含您提供的格式的文本文件（允许多次出现），翻译相关部分，并在输出文件夹中为每个输入文件创建一个新的翻译文本文件。
请注意，谷歌翻译是不知道它的准确性。
googletrans翻译了你的例子：
"完成黑彼得的案子"改成"瓦尔米斯·穆斯塔·佩卡·塔帕乌斯. "
“是啊，船长！”到“哎，卡皮蒂尼！”

from googletrans import Translator
import os
import re
INPUT_FOLDER_PATH = 'path/to/inputFolder'
OUTPUT_FOLDER_PATH = 'path/to/outputFolder'
# a translator object from the googletrans api
tl = Translator()
# go through all the files in the input folder
for filename in os.listdir(INPUT_FOLDER_PATH):
    # open the file to translate and split the data into lines
    in_file = open(f'{INPUT_FOLDER_PATH}/{filename}', 'r')
    data = in_file.read()
    data = data.split('\n')
    # the modified data string we will now fill
    transl_data = ""
    # translate the relevant parts of each line
    for line in data:
        # find matches: is this a relevant line?
        locname = re.findall('(?<=LocName=").*(?=")', line)
        locdesc = re.findall('(?<=LocDescription=").*(?=")', line)
        # if there is a locName or locDescription match, translate the important part and replace it
        if len(locname) == 1:
            locname_trans = tl.translate(locname[0], dest='fi').text
            line = re.sub('(?<=LocName=").*(?=")', locname_trans, line)
        elif len(locdesc) == 1:
            locdesc_trans = tl.translate(locdesc[0], dest='fi').text
            line = re.sub('(?<=LocDescription=").*(?=")', locdesc_trans, line)
        # add the translated line to the translated string
        transl_data += line + '\n'
    # create a new file for the translations 
    out_file = open(f'{OUTPUT_FOLDER_PATH}/{filename}-translated', 'w')
    # write the translated data to the output file
    out_file.write(transl_data)
    # clean up
    in_file.close()
    out_file.close()