What's wrong
An `<input type="image">` missing `alt` text has no accessible name for screen readers.
Who it affects
Screen reader users cannot identify the button's action and hear only 'Image button, unlabelled'.
How to fix on WordPress
Add `alt="<?php esc_attr_e( 'Submit', 'textdomain' ); ?>"` to image buttons.
Code example
Problematic Code
PHP
<input type="image" src="<?php echo esc_url( $btn_img ); ?>">Recommended Accessible Code
PHP
<input type="image" src="<?php echo esc_url( $btn_img ); ?>" alt="<?php esc_attr_e( 'Search products', 'textdomain' ); ?>">How to check your fix
Inspect `<input type="image">` elements and confirm `alt` attribute is non-empty and descriptive.