A new translation folder overrides my usual translation from “nowhere”

WordPress now auto–updates translations for extensions from official repositories.

This can be disabled by add_filter( 'auto_update_translation', '__return_false' );

I would note that if simply presence of translation files breaks functionality of the site — there are likely issues with how it was implemented in first place.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)