padded_english_sentences, padded_norwegian_sentences)

    # Count vocabulary in English and Norwegian sentences
    for sentence in english_train_sentences:
        english_language.count_words(sentence)

    for sentence in norwegian_train_sentences:
        norwegian_language.count_words(sentence)

    # Choose top N vocabulary in both languages
    N = 10000
    english_language.top_n_words(N)
    norwegian_language.top_n_words(N)

    # Create dictionary to map words to idx
    english_language.index_words()
    norwegian_language.index_words()

    # Convert sentences into indices
    english_train_sentences_ids = convert_sentences_index(
        english_language, english_train_sentences)
    norwegian_train_sentences_ids = convert_sentences_index(
        norwegian_language, norwegian_train_sentences)
    english_test_sentences_ids = convert_sentences_index(
        english_language, english_test_sentences)
    norwegian_test_sentences_ids = convert_sentences_index(
        norwegian_language, norwegian_test_sentences)

    print(english_train_sentences_ids.shape)
    print(norwegian_train_sentences_ids.shape)