[#431] add partial support for commands in burmese, cantonese & swahili

context

we have had multiple requests for supporting different languages over the past year - one of the main difficulties being that the notifications in our codebase are a heavy lift for ongoing translation.

as a mediation strategy, we decided to partially support some burmese, cantonese, and swahili commands, but to keep the rest of the notifications coming from those channels as english.

implementation

with help from @aguestuser and our lovely users, the EN file now loads commands from MY, SW, and ZH-CN (abbrevs taken from https://www.npmjs.com/package/locale-codes

Closes #431 (closed) and #467 (closed)