voice regognition app in Python

main.py

import speech_recognition as sr     # import the library
import webbrowser
import time
import playsound
import os
import random
from gtts import gTTS
from time import ctime

r = sr.Recognizer()                 # initialize recognizer
def record_audio(ask = False):
    with sr.Microphone() as source:     # mention source it will be either Microphone or audio files.
        if ask:
            voiceapp(ask)
        audio = r.listen(source)        # listen to the source
        voice_data = ''
        try:
            voice_data = r.recognize_google(audio, language="pl-PL")    # use recognizer to convert our audio into text part.
        except sr.UnknownValueError:
            voiceapp('nie rozumiem')
        except sr.RequestError:
            voiceapp('Sorka, serwis padł ')
        return voice_data
def voiceapp(audio_string):
    tts = gTTS(text=audio_string, lang='pl')
    r = random.randint(1, 10000000)
    audio_file = 'audio-' + str(r) + '.mp3'
    tts.save(audio_file)
    playsound.playsound(audio_file)
    print(audio_string)
    os.remove(audio_file)

def respond(voice_data):
    if 'imie' in voice_data:
        voiceapp('My name is Marlena')
    if 'date' in voice_data:
        voiceapp(ctime())
    if 'search' in voice_data:
        search = record_audio('What do you want to search for?')
        url = 'https://google.com/search?q=' + search
        webbrowser.get().open(url)
        voiceapp('here is what I found for ' + szukaj)
    if 'place' in voice_data:
        place = record_audio('What is the location?')
        url = 'https://google.nl/maps/place/' + place + '/&'
        webbrowser.get().open(url)
        voiceapp('Here is the location' + place)
    if 'exit' in voice_data:
        exit()
time.sleep(1)
voiceapp('How can I help You?')
while 1:
    voice_data = record_audio()
    respond(voice_data)

unfortunetly my speech app does not recognise Polisch language. Any sugestions?