Retrieve the translation of $text and escapes it for safe use in an attribute.

If there is no translation, or the text domain isn’t loaded, the original text is returned.

Signature

esc_attr__( $text, $domain = 'default' )
text
 (string) Text to translate.
domain
 (string) Optional. Text domain. Unique identifier for retrieving translated strings.
Default: 'default'

Return

(string) Translated text on success, original text on failure.

Source

function esc_attr__( $text, $domain = 'default' ) {
	return esc_attr( translate( $text, $domain ) );
}
WP Trac GitHub

Link here