"Language/locale switch (if language is present in url) has been moved and redesigned.
Now it supports also 2-letter language code and switch user locale before page is rendered. List of supported language formats: xx-YY, xx_YY, xx.
Static pages also support 2 letters country code in URL and has improved language switch mechanism that does not require page reload (Permalinks settings must be re-saved).
Updated language controller to update language slug in URL when changing language on that already containts language slug in URL."
How do you mean exactly? Like when one has a website in English, Germand and Dutch it will be visible as the following:
example.com
example.com/de/
example.com/nl/
Please let me know.
Cool update btw!