🪲 Cannot change the keyword language after changing the UI language (twice)

[platan]

Describe the bug
Cannot change the keyword language after changing the UI language non-English -> English -> non-English.

How to reproduce:

1. Go to the Hedy course https://www.hedy.org/hedy
2. Change the UI language to something else than English e.g. Español (I see https://www.hedy.org/hedy#default in URL)
3. Change the UI language to English (I see https://www.hedy.org/hedy?language=en&keyword_language=en#default in URL).
4. Change the UI language to something else than English e.g. Español (I see https://www.hedy.org/hedy?language=es&keyword_language=es#default in URL)
5. Change the keyword language - no result. Keywords are always in Español.

Workaround
Change the keyword language using the keyword_language parameter in URL, e.g. replace https://www.hedy.org/hedy?language=es&keyword_language=es#default with https://www.hedy.org/hedy?language=es&keyword_language=en#default (keyword_language=en instead of keyword_language=es).

Paste the Hedy code & level
nothing here

Add a screenshot (optional)

What machine and browser you were using (optional)

• MacOS 15.3, Firefox 134
• MacOS 15.3, Safari 18.3