example of translate and polly

lambda_function.py

import boto3
import random
translate = boto3.client("translate")
polly = boto3.client("polly")

def get_valid_voices_for_language(language_code="en"):
    return [
        voice['Id'] for voice in polly.describe_voices()['Voices'] 
        if voice['LanguageCode'].startswith(language_code)
    ]

def translate_and_voice(text):
    # Grab a random voice in the target language
    voice = random.choice(get_valid_voices_for_language(language_code="en"))
    translated = translate.translate_text(
        SourceLanguageCode="auto",
        TargetLanguageCode="en",
        Text=text
    )
    # return the audiostream
    return polly.synthesize_speech(
        OutputFormat="mp3",
        Text=translated['TranslatedText'],
        VoiceId=voice
    )['AudioStream']

def lambda_handler(event, context):
    audio = translate_and_voice(event['text'])
    # return raw bytes
    return resp['AudioStream'].read()

# you could also upload that to s3 or do whatever you want with the raw audio stream