Conference page translations missing for Spanish and Swahili

[cmm25]

Conference page translations missing for Spanish and Swahili

Description

Playwright tests are failing due to missing translations for the conference page in Spanish and Swahili. This is causing 404 timeout errors during the tests.

Specific Issues

1. Spanish translation for the conference page is missing
2. Swahili translation for the conference page is missing

Impact

• Playwright tests are failing
• Users trying to access the conference page in Spanish or Swahili will encounter a 404 error

[TimOsahenru]

We no longer have a dedicated conference page for all translations, as they have been merged into the events page: https://blackpythondevs.com/events/. The reason for the failing tests is that the tests were still attempting to access the /conference endpoint, which has since been removed and failing tests fixed in this PR #435