[Bug] [i18n] Both the front-end and back-end can switch languages, but they are not synchronized

[lkp0000]

Search before asking

• I had searched in the issues and found no similar issues.

Operating system information

Linux

Python version information

=3.11

DB-GPT version

main

Related scenes

• Chat Data
• Chat Excel
• Chat DB
• Chat Knowledge
• Model Management
• Dashboard
• Plugins

Installation Information

• Installation From Source

• Docker Installation

• Docker Compose Installation

• Cluster Installation

• AutoDL Image

• Other

Device information

cpu

Models information

llm:openai proxy

What happened

i can change the LANGUAGE value in the env file.it will take effect after restart.and the front-end can also swith languages, but the back-end remains in its original language.

What you expected to happen

   Can the authorities solve this problem? For example, adding 'content-language' field in the api header

How to reproduce

change language can reproduce.such as app list page.

Additional context

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

[Aries-ckt]

hi sorry about influence your experience, could you show the what app you use and what expect language you want, en or zh?

[lkp0000]

hi sorry about influence your experience, could you show the what app you use and what expect language you want, en or zh?

I may know the reason now, maybe it's because some data is read from the database. But I think there are still some small issues：