for line in open(file, "r", encoding="UTF-8"):
    if ":" in line:
        (foreign, native) = line.rstrip("n").split(":")
        if "," in foreign:
            foreign_words += [foreign.split(",")]
        else:
            foreign_words += [foreign]
        if "," in native:
            native_words += [native.split(",")]
        else:
            native_words += [native]
    self.__foreign_words = foreign_words
    self.__native_words = native_words
    x = random.randint(0, (len(self.__foreign_words) - 1))
    self.__index.set(x)

if answer in correct_word:
    #deleting the words from the lists and congratulating

L = len(self.__foreign_words)
x = random.randint(0, L - 1)
#quits the program if the list length is 0
if L > 0:
    if language == "F":
        correct_word = self.__native_words[x]
    elif language == "N":
        correct_word = self.__foreign_words[x]

    if isinstance(correct_word, str):
        correct_word = correct_word
    else:
        correct_word = ", ".join(correct_word)
    self.__question.set(correct_word)
    # Above I only set the question to be in the form of "word, another word" or "word"
    # instead of ['word', 'another word'] or "word"

    # this here I wish to improve
    if answer == correct_word:
        #here's also code that congratulates on correct answer (not included)
        del self.__foreign_words[x], self.__native_words[x]
    else:
        # telling you here how bad you are for not remembering the word (not included)
        y = self.__wrong_answers.get() + 1
        self.__wrong_answers.set(y)
        self.__foreign_words.append(self.__foreign_words[x])
        self.__native_words.append(self.__native_words[x])

#checks if the list is still not empty after deleting the previous ones
if L - 1 > 0:
    x = random.randint(0, L - 1)
    self.__index.set(x)
    if language == "F":
        new_word = self.__foreign_words[x]
        if not isinstance(new_word, str):
            new_word = ", ".join(self.__foreign_words[x])
        self.__question.set(new_word)

    elif language == "N":
        new_word = self.__native_words[x]
        if not isinstance(new_word, str):
            new_word = ", ".join(self.__native_words[x])
        self.__question.set(new_word)