This module strips invalid xml:lang values from S2S
outgoing stanzas. This is to avoid issues with ejabberd validating these
values.
See notes on ejabberd in
xml-lang-enforcement-findings.md.
modules_enabled = {
"xmllang_check";
}With the plugin installer in Prosody 0.12 you can use:
sudo prosodyctl install --server=https://modules.prosody.im/rocks/ mod_xmllang_check
For earlier versions see the documentation for installing 3rd party modules