can you support more language

[ykugb]

can you support more language some language can't show

[jlesage]

What do you mean exactly ? That some languages are missing? Some don't display correctly ?
If you are talking about some asian languages, make sure to set the ENABLE_CJK_FONT environment variable to 1. See https://github.com/jlesage/docker-freefilesync#environment-variables.