I've tried with:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" lang="${locale.language}">
and
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" lang="${#locale.language}">
but does not work
Answers
It seems like you're trying to use Thymeleaf's expression language (EL) to set the lang attribute of your HTML document based on the locale.language variable. However, the syntax you've used is incorrect. Thymeleaf EL expressions are enclosed within ${} or *{} for variable expressions and #{} for message expressions.
To set the lang attribute of your HTML document using Thymeleaf's expression language, you can use the following syntax:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" th:lang="${#locale.language}">
This will set the lang attribute of the HTML document to the value of the locale.language variable. Make sure that the locale.language variable is correctly populated with the desired language code in your Thymeleaf context.
If you're using Spring Boot with Thymeleaf, you can ensure that the locale.language variable is available by configuring a LocaleResolver in your application context. This resolver will resolve the user's locale based on their preferences or the request context.
