Is your feature request related to a problem? Please describe.
I think this program might benefit from localization into different languages

Describe the solution you'd like
Instead of hardcoding english, create a localization json or similar data structure, and allow users to contribute their own translations with key pair values

Additional context
This program is really popular among russian and spanish speakers. This video about arnis in russian has 40k views. This one in spanish has 200k. I also saw one of the forks being simply a translation into chinese.