Algeria: Confirming Amine Ferhane's item at mediumwave.info, 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
(Amine Ferhane 19 February 2021, Dr. Hansjoerg Biener 20 February 2021 via WOR io group)