Although in the paragraph you emphasized, they use the word `and`:

> The MSSP module can operate in **one of two** modes:

 > -  Serial Peripheral Interface (SPI)  
> - Inter-Integrated Circuit (I2C™)  

[Datasheet][1], page 164.

But probably you can software implement the I2C protocol on other pins.


  [1]: http://ww1.microchip.com/downloads/en/DeviceDoc/41607A.pdf