display month in french in wordpress/php?

there is a custom function in wordpress called date_i18n. so basically you do

echo date_i18n( 'H:i d-m-Y', $ts );

without the setLocale stuff..

find the function date_i18n and its parameters here.

you could even build in your translation all in there, without the language check before:

date_i18n( __( 'H:i d-m-Y', 'textdomain' ) );

(replace ‘textdomain’ with your theme textdomain..)