Chat outputs and GUI texts may be changed by changing the existing or creating a custom language file. Language files can be found at plugins/DungeonsXL/languages/[name].yml. The name can be adjusted in the main configuration.
Custom translations can be found here.
As of v0.8.1, American English is the main language of DungeonsXL. An English language file will be generated automatically. A copy is available here. If you'd like to contribute fixes and improvements, please make a pull request or comment on this issue.
An official, maintained German translation is available here. Many messages are not yet translated. If you'd like to contribute, please comment on this issue.
An official, maintained French translation created by Tiplish is available here. If you'd like to contribute, please comment on this issue.
An inofficial Korean translation created by wysohn for DungeonsXL Beta 0.14.4 is available here.
For reasons of maintenance and redacting, I cannot offer any official support for languages that I do not understand. If you'd like to share your language files, I'd gladly add them as inofficial translations. Please feel free to submit an issue!
~Sataniel, maintainer of DungeonsXL