How do I set a default language for my site? about tabi

[ziyouwa]

I try to also set default_language = "zh-Hans", it show the error xxx twice specified.

[welpo]

base_url = "https://xxx.xx.xx"
title = "中文"
description = "中文"
author = "中文"
generate_feed = true
compile_sass = true
minify_html = true
build_search_index = true

theme = "tabi"

default_language = "zh-Hans"

taxonomies = [{name = "tags", feed = true}]

[search]
...
[link_checker]
internal_level = "warn"

[extra]
...