sk@utsukta.orgyes, i looked at the Zotlabs/Lib/Messagefilter.php and a comment does say
and minimum length is defined as
so it looks like messages shorter than that escape language filter.
// Language matching is a bit tricky, because the language can be ambiguous (detect_language() returns '').
// If the language is ambiguous, the message will pass (be accepted) regardless of language rules.
and minimum length is defined as
define('LANGUAGE_DETECT_MIN_LENGTH', 128);so it looks like messages shorter than that escape language filter.