Does the Orc Blood ability
"Orc Blood: Half-orcs count as both humans and orcs for any effect related to race."
Allow the Half-Orc to select any languages a human might?
No. You also don't get the extra feat at level 1 or the extra skill point every level.
You can choose to cast human only spells, can be the target of human only abilities, and can choose the human only archetypes and favoured class bonuses. Or you could choose orc feats/traits/archetypes/spells/etc.
If you want a couple of extra languages you can invest a point or 2 into Lijguistics though