Confirming Amine Ferhane’s item February 19th, I can listen to Radio Algérie Internationale (https://www.radioalgerie.dz/rai, Stream https://www.radioalgerie.dz/player/fr/live/radio-alg%C3%A9rie-internationale) on the following medium wave frequencies:
531 kHz Radio Algérie Internationale (ex youth programme Jil FM, which continues to be heard on 549 kHz)
891 kHz Radio Algérie Internationale (ex Chaîne 1)
252 kHz (which used to carry foreign language external programming looooong ago in the evening) continues transmitting the French language Chaîne 1 (https://www.radioalgerie.dz/chaine3, Stream https://www.radioalgerie.dz/player/fr/live/chaine-3)
I was unable to find any information on the frequency changes at their website https://www.radioalgerie.dz, but I noticed that one can download their Journal du Sahel which is also broadcast on shortwave. https://www.radioalgerie.dz/rai/fr/le-journal-du-sahel
Dr. Hansjoerg Biener (2021-02-20)