Improve speaking grading.

helper/speech_to_text_helper.py

@@ -21,4 +21,10 @@ def text_to_speech(text: str, file_name: str):
 def has_words(text: str):
     english_words = set(words.words())
     words_in_input = text.split()
-    return any(word.lower() in english_words for word in words_in_input)
+    return any(word.lower() in english_words for word in words_in_input)
+
+def has_10_words(text: str):
+    english_words = set(words.words())
+    words_in_input = text.split()
+    english_word_count = sum(1 for word in words_in_input if word.lower() in english_words)
+    return english_word_count >= 10