Nouns ending in -er are usually masculine.
Is parler masculine or feminine?
leparler
The rule behind it
94.6% of -er nouns are masculine
In context
Tu n'as pas honte de parler ainsi ?
Aren't you ashamed to talk like that?
Je ne sais parler ni français ni allemand.
I can speak neither French nor German.
Il embauchera quelqu'un qui sait parler anglais.
He will hire someone who speaks English.