What feature do you want to see added?

.# Language
language:
.# The default language that will be used if auto-language is false or no matching language file was found.
default-language: en_us
.# If set to true, will display messages based on client language
auto-language: true

Are there any alternatives?

https://github.com/moom0o/AnarchyExploitFixes with multilang system
skinsrestorer V15 with multilang system

Anything else?

.

Multi-lang feature is tracked with #1076