Spanish is the language spoken in Spain, someone from Spain, or describes anything to do with Spain.
Sparring is a term for a fight, usually one for training purposes. Sparring might also mean a fight as part of a competition, and can be used to talk about a non-physical contest, such as verbal sparring. Once a fight is fueled by emotion and gets out of control, it isn't sparring.
A spark is a tiny piece of something, usually metal, that is glowing red-hot. Sparks are often made when you strike two surfaces together very hard and bits of one surface are broken off. The sparks in the picture were made by an angle grinder.
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When you speak to someone, you use your mouth to make words that say something.
A speaker, or loudspeaker, is a device that converts electrical signals into sound. They do this by using that electrical signal to vibrate a cone-shaped device at particular frequencies that are encoded by the signal, which produces sound. Larger cones are better at making low sounds, smaller ones are better at making high sounds.
