lang attribute
The lang attribute lets you declare the language of the content of an HTML element.
Outlook
Windows
2003
2007
2010
2013
2016
2019
Windows Mail
2020-10
macOS
2011
2016
16.80
Outlook.com
2020-10
2024-01
iOS
2020-10
Android
2020-10
Samsung Email
Android
6.0
Mozilla Thunderbird
macOS
78.4
Fastmail
Desktop Webmail
2021-07
HEY
Desktop Webmail
2020-10
LaPoste.net
Desktop Webmail
2021-08
1&1
Desktop Webmail
2022-06
Android
2022-06
Mail.ru
Desktop Webmail
2020-10
WP.pl
Desktop Webmail
2024-04