I just participated in a webinar with the Vaisala Xweather developers and asked the following questions:
1) will free/limited use API keys continue to be available to data submitters to pwsweather.com?
Answer: yes.. old keys for api.aerisweather.com will work with data.api.xweather.com and new keys
are available for signups at
https://signup.xweather.com/pws-contributor2) will queries to existing api.aerisweather.com continue to work?
Answer: Yes, there are no plans to discontinue that long existing URL. Apps using that URL should
change to data.api.xweather.com as they update, but no urgency.
3) several APIs (VisualCrossing, OpenWeatherMap, WU/TWC) provide lang={iso-lang] capability on forecast text for multilingual support. Are you planning on that?
Answer: Yes, it should be available in a few months. The alerts queries (for Canada) already support lang=(en|fr) since the EC provides alerts in English and French.
4) are you worried that Xweather might have legal issues brought by Elon Musk's 'X'?
Answer: No. We had Xweather before they'd rebranded Twitter to X (chuckles)
I've been working on a XW-forecast.php script (which is ready), but given the coming multilingual capability of the API and the continuation of the end-point api.aerisweather.com, I'm in no hurry to force an update to all the AW-forecast.php script set (and Base-World users) just now.
More news as I hear more...