updating eSpeak, LibLouis and Unicode CLDR for 2026.3

[seanbudd]

Related issues, PRs or discussions

No response

What is the current state of the codebase?

• Update LibLouis to 3.38.0 #20269
• Espeak hasn't been updated since 2026.1
• Update CLDR to version 48.2 #20234

Why are changes required?

regular maintenance

What technical changes are required?

well documented update steps for each repo

Are the proposed technical changes API breaking?

No

Are there potential risks or issues with the proposed implementation?

yes see docs