Are there any other earthquake magnitude scales other than Richter's?
Earthquakes are measured for intensity and magnitude. Magnitude and intensity are related but measure very different properties of the event. Magnitude is the energy released of the earthquake. It is determined from measurements. Intensity is determined from effects on buildings, landscape and people. Naturally an earthquake with high magnitude would also generate high intensity, but the intensity depends on distance from the hypocenter and the local geological conditions. 

Modified Mercalli Intensity scale is a way to rate the intensity of an earthquake, but the scale ends at XII (Damage total), not at 13-14 (XIII-XIV), as mentioned. China seismic intensity scale (CSIS), Medvedev–Sponheuer–Karnik scale and European macroseismic scale can reach values above ten, but not 13-14. XII on the Medvedev–Sponheuer–Karnik scale is Very catastrophic and IX in Destructive. 
Medvedev–Sponheuer–Karnik scale is used in some Asian and European countries,  Russia, India, Israel etc. CSIS is used in mainland China. 

Magnitude is also measured in different scales. Related to the Richter's scale is the Moment magnitude scale, it's an updated better way to measure, but it usually produce similar values as the old Richter's scale and the two scales are often confused in media. There are few other scales, Body wave magnitude, surface wave magnitude, but to my knowledge they also stay under 10. 

Some of the confusion might come from that the Richter scale is logarithmic. A difference in magnitude of 2.0 is equivalent to a factor of 1000. An earthquake measured to 9.0 is one million times stronger than an earthquake at 5.0.