app.py

import gradio as gr
import datetime
global language

md = "test"
CN_md = "测试"

def update_language(value):
    if value == "zh-CN":
        return [gr.update(visible=False), gr.update(visible=True)]
    else:
        return [gr.update(visible=False), gr.update(visible=True)]
            
with gr.Blocks() as demo:
    with gr.Box() as zh:
        gr.Markdown(CN_md)
    with gr.Box() as eng:
        gr.Markdown(md)
    
    dt = gr.Textbox(label="Current time")
    dt.change(update_language, input=dt, output=[eng, zh])
    
    demo.load(None, inputs=None, outputs=dt, _js="() => navigator.language")
    
demo.launch()