Flutter Web: Identify any changes in language on a page by using the lang attribute (Accessibility) #162324
Description
Use case
The lang attribute is used to identify any changes in language on a page to ensure that user agents can correctly present phrases, passages, and in some cases words written in multiple languages.
Proposal
Add the lang attribute to the list of semantics flags on all Flutter component types/widgets. The first two characters of a language code defines the language of the Web page, and the last two characters define the country. For example English and United States are entered as "en-US".
Valid values for language and country codes can be found at ISO 639-1 Language Codes and ISO Country Codes.
Example on a page where <html lang="en-US">:
<div>The weather is perfect today, <span lang="es-MX">¡qué bueno!</span></div>