In the site configuration ((config|typo3conf)/sites/<sitename>/config.yaml), it is possible to configure the languages and choose a "Fallback type", e.g. "strict" or "fallback". I believe, this corresponds to the TypoScript setting config.sys_language_mode.
Now, how do the TypoScript settings and the settings in the site config.yaml work together?
On the Site handling > Add languages page, there is the following hint:
Used to older TYPO3 versions? The following TypoScript settings will be set based on config.yaml - you don’t need to have them in your TypoScript template:
- config.language
- config.locale_all
- config.htmlTag_dir
- config.htmlTag_langKey
- config.sys_language_uid
- config.sys_language_mode
- config.sys_language_isocode
- config.sys_language_isocode_default
What does this mean? The TS settings will take on the values of the yaml config, but can still be overridden with TypoScript? Which settings are used where?
What happens if you are using for example the bootstrap_package which sets config.sys_language_mode = content_fallback but you want to disable this setting so it uses what is configured in the config.yaml (for example, "strict")?
What happens if you do
config sys_language_mode >
in TypoScript? Does it use the config.yaml setting?
Why do the TypoScript settings still exist?
What is the recommended approach here, do you still need to tamper with the TS settings at all?
(My background is, I have an updated TYPO3 9 site, mostly, it works nicely, but when it comes to the language settings there are still some minor bugs on the site and I am still working on cleaning up the TypoScript settings. Also, I would like to understand this better and where the configuration is moving towards so I do not have to clean up twice.)
