Problems with separating multilingual configurations into separate config files

[mostaja]

Version v0.55.5-A83256B9

I started out with a barebones site by running hugo new site command, and also started out with a blank theme.

Then I configured the config.toml in the project root so that it supports multilingual site. The configuration is as follows:

baseURL       = "http://example.com"
languageCode  = "en-US"
title         =  "Title"
theme         = <theme-name-removed>

DefaultContentLanguage          = "en"
DefaultContentLanguageInSubdir  = true
hasCJKLanguage                  = true

disableKinds = ["taxonomy", "taxonomyTerm"]

[languages]
  [languages.en]
    languageName = "English"
    contentDir = "content/en"
    title = "Studio Tsubasa"
    weight = 1
    
  [[languages.en.menu.main]]
    url = "/en"
    name = "Home"

  [languages.ja]
    languageName = "日本語"
    contentDir = "content/ja"
    weight = 2
    
  [[languages.ja.menu.main]]
    url = "/ja"
    name = "ホーム"
    
  [languages.zh-tw]
    languageName = "繁體"
    contentDir = "content/zh-tw"
    weight = 3
    
  [[languages.zh-cn.menu.main]]
    url = "/zh-cn"
    name = "首页"
    
  [languages.zh-cn]
    languageName = "簡體"
    contentDir = "content/zh-cn"
    weight = 4
  
  [[languages.zh-tw.menu.main]]
    url = "/zh-tw"
    name = "首頁"

then, I moved config.toml into /config/_default. The website can still be built.
Then, I put the language configurations into another file called languages.toml

When I run hugo -v, I get the following error: site config value "en" for defaultContentLanguage does not match any language definition

Then, when I put DefaultContentLanguage = "en" into languages.toml, I get the following error: Failed to parse multilingual config: Language config is not a map: string

I then put the language configuration back into config.toml. Afterwards, I tried putting language-specific menu configs in their own files (menus.en.toml, menus.ja.toml, menus.zh-tw.toml, menus.zn-cn.toml). So I have config.toml and a couple of menus..toml files. I got the following error: unable to process menus in site config

Once line for each language

unable to cast map[string]interface {}{"en":map[string]interface {}{"menu":map[string]interface {}{"main":[]map[string]interface {}{map[string]interface {}{"name":"Home", "url":"/en"}}}}} of type map[string]interface {} to []interface{}

It seems like I have to keep everything inside the main config.toml in order for multilingual configurations to work. The screenshot on getting-started/configuration doc page under "Configuration Directory" seemed to state otherwise.

[bep]

I would recommend looking at this https://github.com/gohugoio/hugoDocs/tree/master/config/_default

If you have further questions, take them at https://discourse.gohugo.io/

[mostaja]

Thank you for the help!

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