Oktopost allows you to target your Facebook Page posts according to specific audience demographics. This means that anyone who's not included under these demographics will not be able to view your post.
To create a targeted update, simply select your Facebook Page when scheduling a new post and click on the targeting icon. This will open a window that allows you to select a target audience by Location and Language. Each setting can contain multiple languages, cities, or countries.
Please note that targeting audiences from Oktopost will not override any Page-level demographic restrictions that may be in place.