3rd Cantonese attempt

Do you speak English?
你識唔識講英文呀?
neih sīkm̀hsīk góng yìngmán a?

Do you speak Cantonese?
你識唔識講廣東話呀
neih sīkm̀hsīk góng gwóngdùngwá a

I don't know how to speak Cantonese.
我唔識講廣東話
ngóh m̀hsìk góng gwóngdùngwá

I know how to speak a little.
我識講小小呀
ngóh sìk góng síusíu a

Thanks (used for a service)
唔該
m̀hgòi

I searched the words up to make my sentences.