1. HashMap non-thread-safe issus
2. Fix the same problem in pr621, but use a better implementation
Add the following functions:
1. There is now a language cache inside getLanguage to prepare for different languages corresponding to different time zones where the accounts in the server are located
With these changes, commercial use is still allowed, but are required to disclose the source, changes, and copyright. Meaning that people won't be unknowingly ripped off, and would be paying knowing that it is an open-source project with possible changes.
tl;drLegal link: https://tldrlegal.com/license/gnu-affero-general-public-license-v3-(agpl-3.0)