XF 2.2 Update phrase by code

[FoxSecrets]

How can I update any phrase by code?

I tried directly, I can see the phrase updated in database, but not in template. How to do it correctly?

$phrase = \XF::finder('XF:Phrase')->where('title', '=', 'xxxxxxxx')->fetchOne();

if ($phrase) {
    $phrase->phrase_text = 'my phrase';
    $phrase->save();
}